401878686400 has 84 divisors (see below), whose sum is σ = 994794797808. Its totient is φ = 159788784640.

The previous prime is 401878686397. The next prime is 401878686413. The reversal of 401878686400 is 4686878104.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 484819 + ... + 1019218.

It is an arithmetic number, because the mean of its divisors is an integer number (11842795212).

Almost surely, 2^401878686400 is an apocalyptic number.

401878686400 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

401878686400 is an abundant number, since it is smaller than the sum of its proper divisors (592916111408).

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

401878686400 is a wasteful number, since it uses less digits than its factorization.

401878686400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1504226 (or 1504211 counting only the distinct ones).

The product of its (nonzero) digits is 2064384, while the sum is 52.

The spelling of 401878686400 in words is "four hundred one billion, eight hundred seventy-eight million, six hundred eighty-six thousand, four hundred".