40440928 has 24 divisors (see below), whose sum is σ = 86856840. Its totient is φ = 18382080.

The previous prime is 40440919. The next prime is 40440929. The reversal of 40440928 is 82904404.

It is a self number, because there is not a number n which added to its sum of digits gives 40440928.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40440929) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57093 + ... + 57796.

It is an arithmetic number, because the mean of its divisors is an integer number (3619035).

Almost surely, 2^40440928 is an apocalyptic number.

It is an amenable number.

40440928 is an abundant number, since it is smaller than the sum of its proper divisors (46415912).

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

40440928 is a wasteful number, since it uses less digits than its factorization.

40440928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114910 (or 114902 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 40440928 is about 6359.3182024491. The cubic root of 40440928 is about 343.2472271789.

The spelling of 40440928 in words is "forty million, four hundred forty thousand, nine hundred twenty-eight".