397170432 has 144 divisors (see below), whose sum is σ = 1207022880. Its totient is φ = 128729088.

The previous prime is 397170427. The next prime is 397170437. The reversal of 397170432 is 234071793.

It is an interprime number because it is at equal distance from previous prime (397170427) and next prime (397170437).

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397170437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 254968 + ... + 256520.

Almost surely, 2^397170432 is an apocalyptic number.

397170432 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 397170432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (603511440).

397170432 is an abundant number, since it is smaller than the sum of its proper divisors (809852448).

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

397170432 is a wasteful number, since it uses less digits than its factorization.

397170432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1615 (or 1595 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 36.

The square root of 397170432 is about 19929.1352546968. The cubic root of 397170432 is about 735.0648172742.

The spelling of 397170432 in words is "three hundred ninety-seven million, one hundred seventy thousand, four hundred thirty-two".