40939920 has 120 divisors (see below), whose sum is σ = 157150656. Its totient is φ = 9356544.

The previous prime is 40939907. The next prime is 40939937. The reversal of 40939920 is 2993904.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 979 + ... + 9101.

Almost surely, 2^40939920 is an apocalyptic number.

40939920 is a gapful number since it is divisible by the number (40) 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 40939920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78575328).

40939920 is an abundant number, since it is smaller than the sum of its proper divisors (116210736).

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

40939920 is a wasteful number, since it uses less digits than its factorization.

40939920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8149 (or 8140 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 36.

The square root of 40939920 is about 6398.4310576891. The cubic root of 40939920 is about 344.6532117074.

The spelling of 40939920 in words is "forty million, nine hundred thirty-nine thousand, nine hundred twenty".