634424340 has 96 divisors (see below), whose sum is σ = 1966938624. Its totient is φ = 151493760.

The previous prime is 634424333. The next prime is 634424347. The reversal of 634424340 is 43424436.

It is an interprime number because it is at equal distance from previous prime (634424333) and next prime (634424347).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 634424298 and 634424307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634424347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37047 + ... + 51393.

It is an arithmetic number, because the mean of its divisors is an integer number (20488944).

Almost surely, 2^634424340 is an apocalyptic number.

634424340 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 634424340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (983469312).

634424340 is an abundant number, since it is smaller than the sum of its proper divisors (1332514284).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

634424340 is a wasteful number, since it uses less digits than its factorization.

634424340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14437 (or 14435 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 30.

The square root of 634424340 is about 25187.7815617017. The cubic root of 634424340 is about 859.2639908005.

Adding to 634424340 its reverse (43424436), we get a palindrome (677848776).

The spelling of 634424340 in words is "six hundred thirty-four million, four hundred twenty-four thousand, three hundred forty".