400666700 has 72 divisors (see below), whose sum is σ = 1008602112. Its totient is φ = 135305280.

The previous prime is 400666691. The next prime is 400666711. The reversal of 400666700 is 7666004.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42629 + ... + 51171.

Almost surely, 2^400666700 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 400666700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (504301056).

400666700 is an abundant number, since it is smaller than the sum of its proper divisors (607935412).

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

400666700 is a wasteful number, since it uses less digits than its factorization.

400666700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8631 (or 8624 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 400666700 is about 20016.6605606430. The cubic root of 400666700 is about 737.2154298064.

The spelling of 400666700 in words is "four hundred million, six hundred sixty-six thousand, seven hundred".