40428928 has 16 divisors (see below), whose sum is σ = 80542260. Its totient is φ = 20214400.

The previous prime is 40428923. The next prime is 40428943. The reversal of 40428928 is 82982404.

It is a tau number, because it is divible by the number of its divisors (16).

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40428923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157798 + ... + 158053.

Almost surely, 2^40428928 is an apocalyptic number.

It is an amenable number.

40428928 is a deficient number, since it is larger than the sum of its proper divisors (40113332).

40428928 is an equidigital number, since it uses as much as digits as its factorization.

40428928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315865 (or 315853 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 37.

The square root of 40428928 is about 6358.3746350777. The cubic root of 40428928 is about 343.2132733405.

The spelling of 40428928 in words is "forty million, four hundred twenty-eight thousand, nine hundred twenty-eight".