397187746 has 16 divisors (see below), whose sum is σ = 610987608. Its totient is φ = 193536000.

The previous prime is 397187737. The next prime is 397187771. The reversal of 397187746 is 647781793.

It can be written as a sum of positive squares in 4 ways, for example, as 195860025 + 201327721 = 13995^2 + 14189^2 .

It is a junction number, because it is equal to n+sod(n) for n = 397187693 and 397187702.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92446 + ... + 96646.

Almost surely, 2^397187746 is an apocalyptic number.

397187746 is a deficient number, since it is larger than the sum of its proper divisors (213799862).

397187746 is a wasteful number, since it uses less digits than its factorization.

397187746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5397.

The product of its digits is 1778112, while the sum is 52.

The square root of 397187746 is about 19929.5696391066. The cubic root of 397187746 is about 735.0754984380.

The spelling of 397187746 in words is "three hundred ninety-seven million, one hundred eighty-seven thousand, seven hundred forty-six".