397628275 has 12 divisors (see below), whose sum is σ = 537882984. Its totient is φ = 289184000.

The previous prime is 397628269. The next prime is 397628279. The reversal of 397628275 is 572826793.

It is not a de Polignac number, because 397628275 - 2⁵ = 397628243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (397628279) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 722686 + ... + 723235.

It is an arithmetic number, because the mean of its divisors is an integer number (44823582).

Almost surely, 2^397628275 is an apocalyptic number.

397628275 is a deficient number, since it is larger than the sum of its proper divisors (140254709).

397628275 is a wasteful number, since it uses less digits than its factorization.

397628275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1445942 (or 1445937 counting only the distinct ones).

The product of its digits is 1270080, while the sum is 49.

The square root of 397628275 is about 19940.6187215944. The cubic root of 397628275 is about 735.3471604182.

The spelling of 397628275 in words is "three hundred ninety-seven million, six hundred twenty-eight thousand, two hundred seventy-five".