401479878 has 16 divisors (see below), whose sum is σ = 804614400. Its totient is φ = 133550856.

The previous prime is 401479877. The next prime is 401479907. The reversal of 401479878 is 878974104.

It is a super-2 number, since 2×401479878² = 322372184877789768, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401479877) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65778 + ... + 71621.

It is an arithmetic number, because the mean of its divisors is an integer number (50288400).

Almost surely, 2^401479878 is an apocalyptic number.

401479878 is an abundant number, since it is smaller than the sum of its proper divisors (403134522).

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

401479878 is a wasteful number, since it uses less digits than its factorization.

401479878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137891.

The product of its (nonzero) digits is 451584, while the sum is 48.

The square root of 401479878 is about 20036.9627937969. The cubic root of 401479878 is about 737.7138343072.

The spelling of 401479878 in words is "four hundred one million, four hundred seventy-nine thousand, eight hundred seventy-eight".