397450940 has 24 divisors (see below), whose sum is σ = 835441152. Its totient is φ = 158829120.

The previous prime is 397450931. The next prime is 397451009. The reversal of 397450940 is 49054793.

It is a congruent number.

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, 13445 + ... + 31235.

It is an arithmetic number, because the mean of its divisors is an integer number (34810048).

Almost surely, 2^397450940 is an apocalyptic number.

It is an amenable number.

397450940 is an abundant number, since it is smaller than the sum of its proper divisors (437990212).

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

397450940 is a wasteful number, since it uses less digits than its factorization.

397450940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18917 (or 18915 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 41.

The square root of 397450940 is about 19936.1716485387. The cubic root of 397450940 is about 735.2378269968.

The spelling of 397450940 in words is "three hundred ninety-seven million, four hundred fifty thousand, nine hundred forty".