400857740540 has 24 divisors (see below), whose sum is σ = 843033789360. Its totient is φ = 160108327808.

The previous prime is 400857740539. The next prime is 400857740551. The reversal of 400857740540 is 45047758004.

It is a junction number, because it is equal to n+sod(n) for n = 400857740491 and 400857740500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14659025 + ... + 14686344.

It is an arithmetic number, because the mean of its divisors is an integer number (35126407890).

Almost surely, 2^400857740540 is an apocalyptic number.

It is an amenable number.

400857740540 is an abundant number, since it is smaller than the sum of its proper divisors (442176048820).

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

400857740540 is a wasteful number, since it uses less digits than its factorization.

400857740540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29346061 (or 29346059 counting only the distinct ones).

The product of its (nonzero) digits is 627200, while the sum is 44.

The spelling of 400857740540 in words is "four hundred billion, eight hundred fifty-seven million, seven hundred forty thousand, five hundred forty".