397954644 has 12 divisors (see below), whose sum is σ = 928560864. Its totient is φ = 132651544.

The previous prime is 397954643. The next prime is 397954673. The reversal of 397954644 is 446459793.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-3 number, since 3×397954644³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397954643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16581432 + ... + 16581455.

It is an arithmetic number, because the mean of its divisors is an integer number (77380072).

Almost surely, 2^397954644 is an apocalyptic number.

It is an amenable number.

397954644 is an abundant number, since it is smaller than the sum of its proper divisors (530606220).

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

397954644 is a wasteful number, since it uses less digits than its factorization.

397954644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33162894 (or 33162892 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 51.

The square root of 397954644 is about 19948.8005654475. The cubic root of 397954644 is about 735.5482937386.

The spelling of 397954644 in words is "three hundred ninety-seven million, nine hundred fifty-four thousand, six hundred forty-four".