397228413 has 8 divisors (see below), whose sum is σ = 529730208. Its totient is φ = 264772784.

The previous prime is 397228397. The next prime is 397228417. The reversal of 397228413 is 314822793.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 397228413 - 2⁴ = 397228397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397228417) 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 in 7 ways as a sum of consecutive naturals, for example, 25795 + ... + 38207.

It is an arithmetic number, because the mean of its divisors is an integer number (66216276).

Almost surely, 2^397228413 is an apocalyptic number.

It is an amenable number.

397228413 is a deficient number, since it is larger than the sum of its proper divisors (132501795).

397228413 is a wasteful number, since it uses less digits than its factorization.

397228413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23083.

The product of its digits is 72576, while the sum is 39.

The square root of 397228413 is about 19930.5898808841. The cubic root of 397228413 is about 735.1005850588.

It can be divided in two parts, 3972 and 28413, that added together give a triangular number (32385 = T₂₅₄).

The spelling of 397228413 in words is "three hundred ninety-seven million, two hundred twenty-eight thousand, four hundred thirteen".