40406664 has 32 divisors (see below), whose sum is σ = 103749120. Its totient is φ = 13104576.

The previous prime is 40406659. The next prime is 40406677. The reversal of 40406664 is 46660404.

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, 21864 + ... + 23639.

It is an arithmetic number, because the mean of its divisors is an integer number (3242160).

Almost surely, 2^40406664 is an apocalyptic number.

It is an amenable number.

40406664 is an abundant number, since it is smaller than the sum of its proper divisors (63342456).

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

40406664 is a wasteful number, since it uses less digits than its factorization.

40406664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45549 (or 45545 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 40406664 is about 6356.6236320865. The cubic root of 40406664 is about 343.1502598515.

The spelling of 40406664 in words is "forty million, four hundred six thousand, six hundred sixty-four".