40006392 has 16 divisors (see below), whose sum is σ = 100016040. Its totient is φ = 13335456.

The previous prime is 40006387. The next prime is 40006427. The reversal of 40006392 is 29360004.

40006392 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×40006392² = 3201022801715328, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 1666933 = 40006392 / (4 + 0 + 0 + 0 + 6 + 3 + 9 + 2).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 833443 + ... + 833490.

Almost surely, 2^40006392 is an apocalyptic number.

It is an amenable number.

40006392 is an abundant number, since it is smaller than the sum of its proper divisors (60009648).

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

40006392 is a wasteful number, since it uses less digits than its factorization.

40006392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1666942 (or 1666938 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 40006392 is about 6325.0606321205. The cubic root of 40006392 is about 342.0134053088.

Adding to 40006392 its reverse (29360004), we get a palindrome (69366396).

The spelling of 40006392 in words is "forty million, six thousand, three hundred ninety-two".