397049028 has 12 divisors (see below), whose sum is σ = 926447760. Its totient is φ = 132349672.

The previous prime is 397049017. The next prime is 397049041. The reversal of 397049028 is 820940793.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

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, 16543698 + ... + 16543721.

It is an arithmetic number, because the mean of its divisors is an integer number (77203980).

Almost surely, 2^397049028 is an apocalyptic number.

It is an amenable number.

397049028 is an abundant number, since it is smaller than the sum of its proper divisors (529398732).

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

397049028 is a wasteful number, since it uses less digits than its factorization.

397049028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33087426 (or 33087424 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 42.

The square root of 397049028 is about 19926.0891295808. The cubic root of 397049028 is about 734.9899133236.

The spelling of 397049028 in words is "three hundred ninety-seven million, forty-nine thousand, twenty-eight".