397024155 has 48 divisors (see below), whose sum is σ = 753442560. Its totient is φ = 191803200.

The previous prime is 397024129. The next prime is 397024169. The reversal of 397024155 is 551420793.

397024155 = 468² + 469² + ... + 1089².

It is a de Polignac number, because none of the positive numbers 2^k-397024155 is a prime.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 152656 + ... + 155234.

It is an arithmetic number, because the mean of its divisors is an integer number (15696720).

Almost surely, 2^397024155 is an apocalyptic number.

397024155 is a deficient number, since it is larger than the sum of its proper divisors (356418405).

397024155 is a wasteful number, since it uses less digits than its factorization.

397024155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2912 (or 2909 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 36.

The square root of 397024155 is about 19925.4649883008. The cubic root of 397024155 is about 734.9745652728.

The spelling of 397024155 in words is "three hundred ninety-seven million, twenty-four thousand, one hundred fifty-five".