634578616 has 24 divisors (see below), whose sum is σ = 1384094520. Its totient is φ = 271962096.

The previous prime is 634578613. The next prime is 634578619. The reversal of 634578616 is 616875436.

It is an interprime number because it is at equal distance from previous prime (634578613) and next prime (634578619).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634578611) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 809020 + ... + 809803.

It is an arithmetic number, because the mean of its divisors is an integer number (57670605).

Almost surely, 2^634578616 is an apocalyptic number.

It is an amenable number.

634578616 is an abundant number, since it is smaller than the sum of its proper divisors (749515904).

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

634578616 is a wasteful number, since it uses less digits than its factorization.

634578616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1618843 (or 1618832 counting only the distinct ones).

The product of its digits is 725760, while the sum is 46.

The square root of 634578616 is about 25190.8438921764. The cubic root of 634578616 is about 859.3336355998. Note that the first 3 decimals are identical.

The spelling of 634578616 in words is "six hundred thirty-four million, five hundred seventy-eight thousand, six hundred sixteen".