400663670 has 24 divisors (see below), whose sum is σ = 792720432. Its totient is φ = 145695440.

The previous prime is 400663661. The next prime is 400663691. The reversal of 400663670 is 76366004.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 164354 + ... + 166773.

It is an arithmetic number, because the mean of its divisors is an integer number (33030018).

Almost surely, 2^400663670 is an apocalyptic number.

400663670 is a deficient number, since it is larger than the sum of its proper divisors (392056762).

400663670 is a wasteful number, since it uses less digits than its factorization.

400663670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331156 (or 331145 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 32.

The square root of 400663670 is about 20016.5848735492. The cubic root of 400663670 is about 737.2135714302.

It can be divided in two parts, 4006 and 63670, that added together give a palindrome (67676).

The spelling of 400663670 in words is "four hundred million, six hundred sixty-three thousand, six hundred seventy".