634540032 has 156 divisors (see below), whose sum is σ = 2095585440. Its totient is φ = 181223424.

The previous prime is 634540019. The next prime is 634540037. The reversal of 634540032 is 230045436.

It is a super-2 number, since 2×634540032² = 805282104421122048, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 634539978 and 634540005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634540037) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 256819 + ... + 259277.

It is an arithmetic number, because the mean of its divisors is an integer number (13433240).

Almost surely, 2^634540032 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 634540032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1047792720).

634540032 is an abundant number, since it is smaller than the sum of its proper divisors (1461045408).

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

634540032 is a wasteful number, since it uses less digits than its factorization.

634540032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2496 (or 2471 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 27.

The square root of 634540032 is about 25190.0780467231. The cubic root of 634540032 is about 859.3162186871.

Adding to 634540032 its reverse (230045436), we get a palindrome (864585468).

The spelling of 634540032 in words is "six hundred thirty-four million, five hundred forty thousand, thirty-two".