397470752 has 72 divisors (see below), whose sum is σ = 941775660. Its totient is φ = 164451840.

The previous prime is 397470743. The next prime is 397470763. The reversal of 397470752 is 257074793.

It can be written as a sum of positive squares in 2 ways, for example, as 387459856 + 10010896 = 19684^2 + 3164^2 .

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 41102 + ... + 49842.

Almost surely, 2^397470752 is an apocalyptic number.

397470752 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 397470752, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (470887830).

397470752 is an abundant number, since it is smaller than the sum of its proper divisors (544304908).

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

397470752 is a wasteful number, since it uses less digits than its factorization.

397470752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8794 (or 8779 counting only the distinct ones).

The product of its (nonzero) digits is 370440, while the sum is 44.

The square root of 397470752 is about 19936.6685281167. The cubic root of 397470752 is about 735.2500434226.

The spelling of 397470752 in words is "three hundred ninety-seven million, four hundred seventy thousand, seven hundred fifty-two".