397251020880 has 240 divisors, whose sum is σ = 1538182264320. Its totient is φ = 89996562432.

The previous prime is 397251020879. The next prime is 397251020897. The reversal of 397251020880 is 88020152793.

It is a happy number.

397251020880 is a `hidden beast` number, since 39 + 7 + 2 + 510 + 20 + 8 + 80 = 666.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 220761 + ... + 918279.

It is an arithmetic number, because the mean of its divisors is an integer number (6409092768).

Almost surely, 2^397251020880 is an apocalyptic number.

397251020880 is a gapful number since it is divisible by the number (30) 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 397251020880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (769091132160).

397251020880 is an abundant number, since it is smaller than the sum of its proper divisors (1140931243440).

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

397251020880 is a wasteful number, since it uses less digits than its factorization.

397251020880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 697658 (or 697649 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The spelling of 397251020880 in words is "three hundred ninety-seven billion, two hundred fifty-one million, twenty thousand, eight hundred eighty".