431685616 has 20 divisors (see below), whose sum is σ = 836790192. Its totient is φ = 215739776.

The previous prime is 431685601. The next prime is 431685629. The reversal of 431685616 is 616586134.

It is a super-2 number, since 2×431685616² = 372704942122598912, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37005 + ... + 47251.

Almost surely, 2^431685616 is an apocalyptic number.

It is an amenable number.

431685616 is a deficient number, since it is larger than the sum of its proper divisors (405104576).

431685616 is a wasteful number, since it uses less digits than its factorization.

431685616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12888 (or 12882 counting only the distinct ones).

The product of its digits is 103680, while the sum is 40.

The square root of 431685616 is about 20777.0454107412. The cubic root of 431685616 is about 755.7692062591.

It can be divided in two parts, 43168 and 5616, that added together give a palindrome (48784).

The spelling of 431685616 in words is "four hundred thirty-one million, six hundred eighty-five thousand, six hundred sixteen".