397929628 has 6 divisors (see below), whose sum is σ = 696376856. Its totient is φ = 198964812.

The previous prime is 397929607. The next prime is 397929629. The reversal of 397929628 is 826929793.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397929629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49741200 + ... + 49741207.

Almost surely, 2^397929628 is an apocalyptic number.

It is an amenable number.

397929628 is a deficient number, since it is larger than the sum of its proper divisors (298447228).

397929628 is a wasteful number, since it uses less digits than its factorization.

397929628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99482411 (or 99482409 counting only the distinct ones).

The product of its digits is 2939328, while the sum is 55.

The square root of 397929628 is about 19948.1735504782. The cubic root of 397929628 is about 735.5328808752.

The spelling of 397929628 in words is "three hundred ninety-seven million, nine hundred twenty-nine thousand, six hundred twenty-eight".