397785260 has 24 divisors (see below), whose sum is σ = 854777616. Its totient is φ = 155413440.

The previous prime is 397785259. The next prime is 397785277. The reversal of 397785260 is 62587793.

It is a super-2 number, since 2×397785260² = 316466226146535200, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 230411 + ... + 232130.

It is an arithmetic number, because the mean of its divisors is an integer number (35615734).

Almost surely, 2^397785260 is an apocalyptic number.

It is an amenable number.

397785260 is an abundant number, since it is smaller than the sum of its proper divisors (456992356).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

397785260 is a wasteful number, since it uses less digits than its factorization.

397785260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462593 (or 462591 counting only the distinct ones).

The product of its (nonzero) digits is 635040, while the sum is 47.

The square root of 397785260 is about 19944.5546453161. The cubic root of 397785260 is about 735.4439202085.

The spelling of 397785260 in words is "three hundred ninety-seven million, seven hundred eighty-five thousand, two hundred sixty".