400000842868 has 12 divisors (see below), whose sum is σ = 763637972832. Its totient is φ = 181818564920.

The previous prime is 400000842859. The next prime is 400000842881. The reversal of 400000842868 is 868248000004.

It is a super-2 number, since 2×400000842868² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 400000842868.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4545464080 + ... + 4545464167.

It is an arithmetic number, because the mean of its divisors is an integer number (63636497736).

Almost surely, 2^400000842868 is an apocalyptic number.

It is an amenable number.

400000842868 is a deficient number, since it is larger than the sum of its proper divisors (363637129964).

400000842868 is a wasteful number, since it uses less digits than its factorization.

400000842868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9090928262 (or 9090928260 counting only the distinct ones).

The product of its (nonzero) digits is 98304, while the sum is 40.

The spelling of 400000842868 in words is "four hundred billion, eight hundred forty-two thousand, eight hundred sixty-eight".