397438090 has 64 divisors (see below), whose sum is σ = 845489664. Its totient is φ = 131666688.

The previous prime is 397438079. The next prime is 397438099. The reversal of 397438090 is 90834793.

397438090 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×397438090³ (a number of 27 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (397438099) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 447627 + ... + 448513.

It is an arithmetic number, because the mean of its divisors is an integer number (13210776).

Almost surely, 2^397438090 is an apocalyptic number.

397438090 is an abundant number, since it is smaller than the sum of its proper divisors (448051574).

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

397438090 is a wasteful number, since it uses less digits than its factorization.

397438090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1111.

The product of its (nonzero) digits is 163296, while the sum is 43.

The square root of 397438090 is about 19935.8493674085. The cubic root of 397438090 is about 735.2299032449.

The spelling of 397438090 in words is "three hundred ninety-seven million, four hundred thirty-eight thousand, ninety".