40247664 has 40 divisors (see below), whose sum is σ = 104255232. Its totient is φ = 13379520.

The previous prime is 40247663. The next prime is 40247671. The reversal of 40247664 is 46674204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40247663) 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, 21319 + ... + 23129.

Almost surely, 2^40247664 is an apocalyptic number.

It is an amenable number.

40247664 is an abundant number, since it is smaller than the sum of its proper divisors (64007568).

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

40247664 is a wasteful number, since it uses less digits than its factorization.

40247664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2285 (or 2279 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 33.

The square root of 40247664 is about 6344.1046649626. The cubic root of 40247664 is about 342.6995700529.

The spelling of 40247664 in words is "forty million, two hundred forty-seven thousand, six hundred sixty-four".