397770825 has 24 divisors (see below), whose sum is σ = 664171776. Its totient is φ = 210040000.

The previous prime is 397770817. The next prime is 397770839. The reversal of 397770825 is 528077793.

It is not a de Polignac number, because 397770825 - 2³ = 397770817 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18681 + ... + 33830.

It is an arithmetic number, because the mean of its divisors is an integer number (27673824).

Almost surely, 2^397770825 is an apocalyptic number.

It is an amenable number.

397770825 is a deficient number, since it is larger than the sum of its proper divisors (266400951).

397770825 is a wasteful number, since it uses less digits than its factorization.

397770825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52625 (or 52620 counting only the distinct ones).

The product of its (nonzero) digits is 740880, while the sum is 48.

The square root of 397770825 is about 19944.1927638097. The cubic root of 397770825 is about 735.4350240674.

The spelling of 397770825 in words is "three hundred ninety-seven million, seven hundred seventy thousand, eight hundred twenty-five".