397178432 has 112 divisors (see below), whose sum is σ = 981456000. Its totient is φ = 155602944.

The previous prime is 397178393. The next prime is 397178491. The reversal of 397178432 is 234871793.

It is a tau number, because it is divible by the number of its divisors (112).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 246044 + ... + 247652.

It is an arithmetic number, because the mean of its divisors is an integer number (8763000).

Almost surely, 2^397178432 is an apocalyptic number.

397178432 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 397178432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (490728000).

397178432 is an abundant number, since it is smaller than the sum of its proper divisors (584277568).

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

397178432 is a wasteful number, since it uses less digits than its factorization.

397178432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1676 (or 1666 counting only the distinct ones).

The product of its digits is 254016, while the sum is 44.

The square root of 397178432 is about 19929.3359648534. The cubic root of 397178432 is about 735.0697525854.

The spelling of 397178432 in words is "three hundred ninety-seven million, one hundred seventy-eight thousand, four hundred thirty-two".