400247568 has 100 divisors (see below), whose sum is σ = 1323952960. Its totient is φ = 114353856.

The previous prime is 400247543. The next prime is 400247591. The reversal of 400247568 is 865742004.

400247568 is a `hidden beast` number, since 400 + 247 + 5 + 6 + 8 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 12988 + ... + 31131.

Almost surely, 2^400247568 is an apocalyptic number.

400247568 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

400247568 is an abundant number, since it is smaller than the sum of its proper divisors (923705392).

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

400247568 is a wasteful number, since it uses less digits than its factorization.

400247568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44146 (or 44131 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

The square root of 400247568 is about 20006.1882426413. The cubic root of 400247568 is about 736.9582764303.

The spelling of 400247568 in words is "four hundred million, two hundred forty-seven thousand, five hundred sixty-eight".