624640431 has 8 divisors (see below), whose sum is σ = 832970880. Its totient is φ = 416368472.

The previous prime is 624640349. The next prime is 624640441. The reversal of 624640431 is 134046426.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 624640431 - 2⁹ = 624639919 is a prime.

It is a super-2 number, since 2×624640431² = 780351336079731522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (624640441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28300 + ... + 45278.

It is an arithmetic number, because the mean of its divisors is an integer number (104121360).

Almost surely, 2^624640431 is an apocalyptic number.

624640431 is a deficient number, since it is larger than the sum of its proper divisors (208330449).

624640431 is a wasteful number, since it uses less digits than its factorization.

624640431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29245.

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 624640431 is about 24992.8075853834. The cubic root of 624640431 is about 854.8239807278.

Adding to 624640431 its reverse (134046426), we get a palindrome (758686857).

The spelling of 624640431 in words is "six hundred twenty-four million, six hundred forty thousand, four hundred thirty-one".