397427539824 has 160 divisors (see below), whose sum is σ = 1304046535680. Its totient is φ = 113523206400.

The previous prime is 397427539801. The next prime is 397427539939. The reversal of 397427539824 is 428935724793.

397427539824 is a `hidden beast` number, since 3 + 9 + 74 + 2 + 7 + 539 + 8 + 24 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14716414 + ... + 14743394.

It is an arithmetic number, because the mean of its divisors is an integer number (8150290848).

Almost surely, 2^397427539824 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 397427539824, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (652023267840).

397427539824 is an abundant number, since it is smaller than the sum of its proper divisors (906618995856).

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

397427539824 is a wasteful number, since it uses less digits than its factorization.

397427539824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31876 (or 31864 counting only the distinct ones).

The product of its digits is 91445760, while the sum is 63.

The spelling of 397427539824 in words is "three hundred ninety-seven billion, four hundred twenty-seven million, five hundred thirty-nine thousand, eight hundred twenty-four".