397841670 has 24 divisors (see below), whose sum is σ = 1034388576. Its totient is φ = 106091088.

The previous prime is 397841669. The next prime is 397841677. The reversal of 397841670 is 76148793.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397841677) 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, 2210142 + ... + 2210321.

It is an arithmetic number, because the mean of its divisors is an integer number (43099524).

Almost surely, 2^397841670 is an apocalyptic number.

397841670 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

397841670 is an abundant number, since it is smaller than the sum of its proper divisors (636546906).

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

397841670 is a wasteful number, since it uses less digits than its factorization.

397841670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4420476 (or 4420473 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The square root of 397841670 is about 19945.9687656428. The cubic root of 397841670 is about 735.4786830439.

The spelling of 397841670 in words is "three hundred ninety-seven million, eight hundred forty-one thousand, six hundred seventy".