397910340 has 48 divisors (see below), whose sum is σ = 1237944960. Its totient is φ = 106109280.

The previous prime is 397910297. The next prime is 397910351. The reversal of 397910340 is 43019793.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 397910295 and 397910304.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 367896 + ... + 368975.

It is an arithmetic number, because the mean of its divisors is an integer number (25790520).

Almost surely, 2^397910340 is an apocalyptic number.

397910340 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

397910340 is an abundant number, since it is smaller than the sum of its proper divisors (840034620).

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

397910340 is a wasteful number, since it uses less digits than its factorization.

397910340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 736889 (or 736881 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 36.

The square root of 397910340 is about 19947.6900918377. The cubic root of 397910340 is about 735.5209967074.

The spelling of 397910340 in words is "three hundred ninety-seven million, nine hundred ten thousand, three hundred forty".