397407572 has 36 divisors (see below), whose sum is σ = 777217140. Its totient is φ = 177161472.

The previous prime is 397407551. The next prime is 397407583. The reversal of 397407572 is 275704793.

It can be written as a sum of positive squares in 2 ways, for example, as 252301456 + 145106116 = 15884^2 + 12046^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16454 + ... + 32642.

It is an arithmetic number, because the mean of its divisors is an integer number (21589365).

Almost surely, 2^397407572 is an apocalyptic number.

It is an amenable number.

397407572 is a deficient number, since it is larger than the sum of its proper divisors (379809568).

397407572 is a wasteful number, since it uses less digits than its factorization.

397407572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16248 (or 16227 counting only the distinct ones).

The product of its (nonzero) digits is 370440, while the sum is 44.

The square root of 397407572 is about 19935.0839476537. The cubic root of 397407572 is about 735.2110841122.

The spelling of 397407572 in words is "three hundred ninety-seven million, four hundred seven thousand, five hundred seventy-two".