401665436 has 24 divisors (see below), whose sum is σ = 714178080. Its totient is φ = 197640000.

The previous prime is 401665427. The next prime is 401665441. The reversal of 401665436 is 634566104.

It is a super-2 number, since 2×401665436² = 322670244954140192, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 401665396 and 401665405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62786 + ... + 68886.

It is an arithmetic number, because the mean of its divisors is an integer number (29757420).

Almost surely, 2^401665436 is an apocalyptic number.

It is an amenable number.

401665436 is a deficient number, since it is larger than the sum of its proper divisors (312512644).

401665436 is a wasteful number, since it uses less digits than its factorization.

401665436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6365 (or 6363 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 35.

The square root of 401665436 is about 20041.5926512840. The cubic root of 401665436 is about 737.8274702387.

The spelling of 401665436 in words is "four hundred one million, six hundred sixty-five thousand, four hundred thirty-six".