397197504 has 252 divisors, whose sum is σ = 1291148040. Its totient is φ = 116582400.

The previous prime is 397197491. The next prime is 397197509. The reversal of 397197504 is 405791793.

It is a self number, because there is not a number n which added to its sum of digits gives 397197504.

It is not an unprimeable number, because it can be changed into a prime (397197509) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2857467 + ... + 2857605.

Almost surely, 2^397197504 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 397197504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (645574020).

397197504 is an abundant number, since it is smaller than the sum of its proper divisors (893950536).

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

397197504 is a wasteful number, since it uses less digits than its factorization.

397197504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220 (or 196 counting only the distinct ones).

The product of its (nonzero) digits is 238140, while the sum is 45.

The square root of 397197504 is about 19929.8144497133. The cubic root of 397197504 is about 735.0815181000.

It can be divided in two parts, 3971 and 97504, that added together give a triangular number (101475 = T₄₅₀).

The spelling of 397197504 in words is "three hundred ninety-seven million, one hundred ninety-seven thousand, five hundred four".