400023856966 has 16 divisors (see below), whose sum is σ = 619452782208. Its totient is φ = 193540867200.

The previous prime is 400023856963. The next prime is 400023857011. The reversal of 400023856966 is 669658320004.

It is a super-2 number, since 2×400023856966² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400023856963) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 327336 + ... + 952468.

It is an arithmetic number, because the mean of its divisors is an integer number (38715798888).

Almost surely, 2^400023856966 is an apocalyptic number.

400023856966 is a deficient number, since it is larger than the sum of its proper divisors (219428925242).

400023856966 is a wasteful number, since it uses less digits than its factorization.

400023856966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 635487.

The product of its (nonzero) digits is 1866240, while the sum is 49.

The spelling of 400023856966 in words is "four hundred billion, twenty-three million, eight hundred fifty-six thousand, nine hundred sixty-six".