397075428 has 36 divisors (see below), whose sum is σ = 1020736080. Its totient is φ = 130114416.

The previous prime is 397075423. The next prime is 397075429. The reversal of 397075428 is 824570793.

397075428 is a `hidden beast` number, since 39 + 70 + 7 + 542 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (397075423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 91350 + ... + 95597.

It is an arithmetic number, because the mean of its divisors is an integer number (28353780).

Almost surely, 2^397075428 is an apocalyptic number.

It is an amenable number.

397075428 is an abundant number, since it is smaller than the sum of its proper divisors (623660652).

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

397075428 is a wasteful number, since it uses less digits than its factorization.

397075428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187016 (or 187011 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 45.

The square root of 397075428 is about 19926.7515666754. The cubic root of 397075428 is about 735.0062029186.

The spelling of 397075428 in words is "three hundred ninety-seven million, seventy-five thousand, four hundred twenty-eight".