397018436 has 24 divisors (see below), whose sum is σ = 716157120. Its totient is φ = 192441312.

The previous prime is 397018429. The next prime is 397018451. The reversal of 397018436 is 634810793.

It is a junction number, because it is equal to n+sod(n) for n = 397018393 and 397018402.

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, 37145 + ... + 46623.

It is an arithmetic number, because the mean of its divisors is an integer number (29839880).

Almost surely, 2^397018436 is an apocalyptic number.

It is an amenable number.

397018436 is a deficient number, since it is larger than the sum of its proper divisors (319138684).

397018436 is a wasteful number, since it uses less digits than its factorization.

397018436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9803 (or 9801 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 397018436 is about 19925.3214779586. The cubic root of 397018436 is about 734.9710362351.

The spelling of 397018436 in words is "three hundred ninety-seven million, eighteen thousand, four hundred thirty-six".