397447776 has 384 divisors, whose sum is σ = 1393459200. Its totient is φ = 108864000.

The previous prime is 397447711. The next prime is 397447837. The reversal of 397447776 is 677744793.

397447776 is a `hidden beast` number, since 39 + 74 + 477 + 76 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5597821 + ... + 5597891.

It is an arithmetic number, because the mean of its divisors is an integer number (3628800).

Almost surely, 2^397447776 is an apocalyptic number.

397447776 is a gapful number since it is divisible by the number (36) 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 397447776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (696729600).

397447776 is an abundant number, since it is smaller than the sum of its proper divisors (996011424).

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

397447776 is a wasteful number, since it uses less digits than its factorization.

397447776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151 (or 137 counting only the distinct ones).

The product of its digits is 6223392, while the sum is 54.

The square root of 397447776 is about 19936.0922951315. The cubic root of 397447776 is about 735.2358759814.

The spelling of 397447776 in words is "three hundred ninety-seven million, four hundred forty-seven thousand, seven hundred seventy-six".