400960878 has 16 divisors (see below), whose sum is σ = 849093840. Its totient is φ = 125791616.

The previous prime is 400960871. The next prime is 400960883. The reversal of 400960878 is 878069004.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400960871) 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, 1965393 + ... + 1965596.

It is an arithmetic number, because the mean of its divisors is an integer number (53068365).

Almost surely, 2^400960878 is an apocalyptic number.

400960878 is an abundant number, since it is smaller than the sum of its proper divisors (448132962).

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

400960878 is a wasteful number, since it uses less digits than its factorization.

400960878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3931011.

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 400960878 is about 20024.0075409494. The cubic root of 400960878 is about 737.3958120749.

The spelling of 400960878 in words is "four hundred million, nine hundred sixty thousand, eight hundred seventy-eight".