400042864690 has 32 divisors (see below), whose sum is σ = 858725556480. Its totient is φ = 131194181184.

The previous prime is 400042864679. The next prime is 400042864691. The reversal of 400042864690 is 96468240004.

It is a super-2 number, since 2×400042864690² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (400042864691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 124235305 + ... + 124238524.

It is an arithmetic number, because the mean of its divisors is an integer number (26835173640).

Almost surely, 2^400042864690 is an apocalyptic number.

400042864690 is an abundant number, since it is smaller than the sum of its proper divisors (458682691790).

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

400042864690 is a wasteful number, since it uses less digits than its factorization.

400042864690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248473866.

The product of its (nonzero) digits is 331776, while the sum is 43.

The spelling of 400042864690 in words is "four hundred billion, forty-two million, eight hundred sixty-four thousand, six hundred ninety".