40339992 has 128 divisors (see below), whose sum is σ = 127733760. Its totient is φ = 10312320.

The previous prime is 40339987. The next prime is 40340017. The reversal of 40339992 is 29993304.

It is a self number, because there is not a number n which added to its sum of digits gives 40339992.

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 31 ways as a sum of consecutive naturals, for example, 153253 + ... + 153515.

It is an arithmetic number, because the mean of its divisors is an integer number (997920).

Almost surely, 2^40339992 is an apocalyptic number.

40339992 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40339992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63866880).

40339992 is an abundant number, since it is smaller than the sum of its proper divisors (87393768).

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

40339992 is a wasteful number, since it uses less digits than its factorization.

40339992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373 (or 369 counting only the distinct ones).

The product of its (nonzero) digits is 52488, while the sum is 39.

The square root of 40339992 is about 6351.3771734955. The cubic root of 40339992 is about 342.9614204640.

The spelling of 40339992 in words is "forty million, three hundred thirty-nine thousand, nine hundred ninety-two".