402031616 has 44 divisors (see below), whose sum is σ = 918497088. Its totient is φ = 172296192.

The previous prime is 402031613. The next prime is 402031661. The reversal of 402031616 is 616130204.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 402031591 and 402031600.

It is not an unprimeable number, because it can be changed into a prime (402031613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20876 + ... + 35211.

Almost surely, 2^402031616 is an apocalyptic number.

It is an amenable number.

402031616 is an abundant number, since it is smaller than the sum of its proper divisors (516465472).

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

402031616 is an equidigital number, since it uses as much as digits as its factorization.

402031616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56114 (or 56096 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 402031616 is about 20050.7260716414. The cubic root of 402031616 is about 738.0516166530.

The spelling of 402031616 in words is "four hundred two million, thirty-one thousand, six hundred sixteen".