40404992 has 48 divisors (see below), whose sum is σ = 81981900. Its totient is φ = 19906560.

The previous prime is 40404983. The next prime is 40405003. The reversal of 40404992 is 29940404.

It can be written as a sum of positive squares in 2 ways, for example, as 38142976 + 2262016 = 6176^2 + 1504^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 223142 + ... + 223322.

Almost surely, 2^40404992 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 40404992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40990950).

40404992 is an abundant number, since it is smaller than the sum of its proper divisors (41576908).

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

40404992 is a wasteful number, since it uses less digits than its factorization.

40404992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312 (or 292 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 40404992 is about 6356.4921143662. The cubic root of 40404992 is about 343.1455266789.

The spelling of 40404992 in words is "forty million, four hundred four thousand, nine hundred ninety-two".