397922924 has 36 divisors (see below), whose sum is σ = 814975056. Its totient is φ = 169503264.

The previous prime is 397922923. The next prime is 397922933. The reversal of 397922924 is 429229793.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (397922923) 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, 26654 + ... + 38810.

It is an arithmetic number, because the mean of its divisors is an integer number (22638196).

Almost surely, 2^397922924 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 397922924, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (407487528).

397922924 is an abundant number, since it is smaller than the sum of its proper divisors (417052132).

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

397922924 is a wasteful number, since it uses less digits than its factorization.

397922924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12342 (or 12333 counting only the distinct ones).

The product of its digits is 489888, while the sum is 47.

The square root of 397922924 is about 19948.0055143365. The cubic root of 397922924 is about 735.5287502955.

The spelling of 397922924 in words is "three hundred ninety-seven million, nine hundred twenty-two thousand, nine hundred twenty-four".