634904340 has 96 divisors (see below), whose sum is σ = 2038278144. Its totient is φ = 144650880.

The previous prime is 634904327. The next prime is 634904353. The reversal of 634904340 is 43409436.

It is an interprime number because it is at equal distance from previous prime (634904327) and next prime (634904353).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 136737 + ... + 141303.

It is an arithmetic number, because the mean of its divisors is an integer number (21232064).

Almost surely, 2^634904340 is an apocalyptic number.

634904340 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 634904340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1019139072).

634904340 is an abundant number, since it is smaller than the sum of its proper divisors (1403373804).

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

634904340 is a wasteful number, since it uses less digits than its factorization.

634904340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4917 (or 4915 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 33.

The square root of 634904340 is about 25197.3081895666. The cubic root of 634904340 is about 859.4806400868.

The spelling of 634904340 in words is "six hundred thirty-four million, nine hundred four thousand, three hundred forty".