397634784 has 24 divisors (see below), whose sum is σ = 1043791560. Its totient is φ = 132544896.

The previous prime is 397634767. The next prime is 397634801. The reversal of 397634784 is 487436793.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (397634767) and next prime (397634801).

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×397634784² = 316226842893453312, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2070919 + ... + 2071110.

It is an arithmetic number, because the mean of its divisors is an integer number (43491315).

Almost surely, 2^397634784 is an apocalyptic number.

It is an amenable number.

397634784 is an abundant number, since it is smaller than the sum of its proper divisors (646156776).

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

397634784 is a wasteful number, since it uses less digits than its factorization.

397634784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4142042 (or 4142034 counting only the distinct ones).

The product of its digits is 3048192, while the sum is 51.

The square root of 397634784 is about 19940.7819305061. The cubic root of 397634784 is about 735.3511728329.

The spelling of 397634784 in words is "three hundred ninety-seven million, six hundred thirty-four thousand, seven hundred eighty-four".