40028648 has 32 divisors (see below), whose sum is σ = 85440960. Its totient is φ = 17402880.

The previous prime is 40028641. The next prime is 40028689. The reversal of 40028648 is 84682004.

It is not an unprimeable number, because it can be changed into a prime (40028641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7865 + ... + 11912.

It is an arithmetic number, because the mean of its divisors is an integer number (2670030).

Almost surely, 2^40028648 is an apocalyptic number.

It is an amenable number.

40028648 is an abundant number, since it is smaller than the sum of its proper divisors (45412312).

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

40028648 is a wasteful number, since it uses less digits than its factorization.

40028648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19817 (or 19813 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 32.

The square root of 40028648 is about 6326.8197382255. The cubic root of 40028648 is about 342.0768155031.

The spelling of 40028648 in words is "forty million, twenty-eight thousand, six hundred forty-eight".