40288664 has 32 divisors (see below), whose sum is σ = 85638000. Its totient is φ = 17615232.

The previous prime is 40288649. The next prime is 40288673. The reversal of 40288664 is 46688204.

It is a happy number.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8219 + ... + 12170.

Almost surely, 2^40288664 is an apocalyptic number.

It is an amenable number.

40288664 is an abundant number, since it is smaller than the sum of its proper divisors (45349336).

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

40288664 is a wasteful number, since it uses less digits than its factorization.

40288664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20427 (or 20423 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 38.

The square root of 40288664 is about 6347.3351888804. The cubic root of 40288664 is about 342.8158990732.

The spelling of 40288664 in words is "forty million, two hundred eighty-eight thousand, six hundred sixty-four".