40039974 has 32 divisors (see below), whose sum is σ = 95823840. Its totient is φ = 12319776.

The previous prime is 40039949. The next prime is 40039991. The reversal of 40039974 is 47993004.

40039974 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

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 15 ways as a sum of consecutive naturals, for example, 27817 + ... + 29220.

It is an arithmetic number, because the mean of its divisors is an integer number (2994495).

Almost surely, 2^40039974 is an apocalyptic number.

40039974 is an abundant number, since it is smaller than the sum of its proper divisors (55783866).

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

40039974 is a wasteful number, since it uses less digits than its factorization.

40039974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57061 (or 57055 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 40039974 is about 6327.7147533687. The cubic root of 40039974 is about 342.1090757038.

It can be divided in two parts, 4003997 and 4, that added together give a square (4004001 = 2001²).

The spelling of 40039974 in words is "forty million, thirty-nine thousand, nine hundred seventy-four".