406465878 has 48 divisors (see below), whose sum is σ = 1018407600. Its totient is φ = 107198784.

The previous prime is 406465849. The next prime is 406465907. The reversal of 406465878 is 878564604.

It is an interprime number because it is at equal distance from previous prime (406465849) and next prime (406465907).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 49353 + ... + 56996.

It is an arithmetic number, because the mean of its divisors is an integer number (21216825).

Almost surely, 2^406465878 is an apocalyptic number.

406465878 is an abundant number, since it is smaller than the sum of its proper divisors (611941722).

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

406465878 is a wasteful number, since it uses less digits than its factorization.

406465878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106381 (or 106374 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 48.

The square root of 406465878 is about 20160.9989335846. The cubic root of 406465878 is about 740.7551810973.

The spelling of 406465878 in words is "four hundred six million, four hundred sixty-five thousand, eight hundred seventy-eight".