400247880 has 64 divisors (see below), whose sum is σ = 1203672960. Its totient is φ = 106472448.

The previous prime is 400247849. The next prime is 400247893. The reversal of 400247880 is 88742004.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48109 + ... + 55811.

It is an arithmetic number, because the mean of its divisors is an integer number (18807390).

Almost surely, 2^400247880 is an apocalyptic number.

400247880 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

400247880 is an abundant number, since it is smaller than the sum of its proper divisors (803425080).

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

400247880 is a wasteful number, since it uses less digits than its factorization.

400247880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8150 (or 8146 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 33.

The square root of 400247880 is about 20006.1960402271. The cubic root of 400247880 is about 736.9584679208.

Adding to 400247880 its reverse (88742004), we get a palindrome (488989884).

The spelling of 400247880 in words is "four hundred million, two hundred forty-seven thousand, eight hundred eighty".