40000392 has 40 divisors (see below), whose sum is σ = 112039950. Its totient is φ = 13333248.

The previous prime is 40000369. The next prime is 40000409. The reversal of 40000392 is 29300004.

It can be written as a sum of positive squares in only one way, i.e., 22410756 + 17589636 = 4734^2 + 4194^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

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 9 ways as a sum of consecutive naturals, for example, 30217 + ... + 31512.

Almost surely, 2^40000392 is an apocalyptic number.

It is an amenable number.

40000392 is an abundant number, since it is smaller than the sum of its proper divisors (72039558).

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

40000392 is a wasteful number, since it uses less digits than its factorization.

40000392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61747 (or 61734 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 40000392 is about 6324.5863105819. The cubic root of 40000392 is about 341.9963065160.

Adding to 40000392 its reverse (29300004), we get a palindrome (69300396).

The spelling of 40000392 in words is "forty million, three hundred ninety-two", and thus it is an aban number.