40392864 has 48 divisors (see below), whose sum is σ = 117815040. Its totient is φ = 13464000.

The previous prime is 40392851. The next prime is 40392883. The reversal of 40392864 is 46829304.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 22512 + ... + 24239.

It is an arithmetic number, because the mean of its divisors is an integer number (2454480).

Almost surely, 2^40392864 is an apocalyptic number.

It is an amenable number.

40392864 is an abundant number, since it is smaller than the sum of its proper divisors (77422176).

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

40392864 is a wasteful number, since it uses less digits than its factorization.

40392864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46770 (or 46756 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 40392864 is about 6355.5380574740. The cubic root of 40392864 is about 343.1111902830. Note that the first 4 decimals are identical.

It can be divided in two parts, 4039 and 2864, that added together give a triangular number (6903 = T₁₁₇).

The spelling of 40392864 in words is "forty million, three hundred ninety-two thousand, eight hundred sixty-four".