40939392 has 128 divisors (see below), whose sum is σ = 119952000. Its totient is φ = 12294144.

The previous prime is 40939391. The next prime is 40939399. The reversal of 40939392 is 29393904.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 40939392.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40939391) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 294459 + ... + 294597.

It is an arithmetic number, because the mean of its divisors is an integer number (937125).

Almost surely, 2^40939392 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40939392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59976000).

40939392 is an abundant number, since it is smaller than the sum of its proper divisors (79012608).

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

40939392 is a wasteful number, since it uses less digits than its factorization.

40939392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228 (or 216 counting only the distinct ones).

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

The square root of 40939392 is about 6398.3897974412. The cubic root of 40939392 is about 344.6517300429.

The spelling of 40939392 in words is "forty million, nine hundred thirty-nine thousand, three hundred ninety-two".