400397037216 has 192 divisors, whose sum is σ = 1168125235200. Its totient is φ = 119063116800.

The previous prime is 400397037211. The next prime is 400397037241. The reversal of 400397037216 is 612730793004.

It is a super-2 number, since 2×400397037216² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (400397037211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28271545 + ... + 28285703.

It is an arithmetic number, because the mean of its divisors is an integer number (6083985600).

Almost surely, 2^400397037216 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 400397037216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (584062617600).

400397037216 is an abundant number, since it is smaller than the sum of its proper divisors (767728197984).

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

400397037216 is a wasteful number, since it uses less digits than its factorization.

400397037216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14683 (or 14675 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 42.

The spelling of 400397037216 in words is "four hundred billion, three hundred ninety-seven million, thirty-seven thousand, two hundred sixteen".