400141140978 has 32 divisors (see below), whose sum is σ = 818999406720. Its totient is φ = 130295329920.

The previous prime is 400141140901. The next prime is 400141140979. The reversal of 400141140978 is 879041141004.

It is a super-2 number, since 2×400141140978² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (400141140979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4262275 + ... + 4355142.

It is an arithmetic number, because the mean of its divisors is an integer number (25593731460).

Almost surely, 2^400141140978 is an apocalyptic number.

400141140978 is an abundant number, since it is smaller than the sum of its proper divisors (418858265742).

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

400141140978 is a wasteful number, since it uses less digits than its factorization.

400141140978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8617602.

The product of its (nonzero) digits is 32256, while the sum is 39.

The spelling of 400141140978 in words is "four hundred billion, one hundred forty-one million, one hundred forty thousand, nine hundred seventy-eight".