28403650 has 48 divisors (see below), whose sum is σ = 59023008. Its totient is φ = 10080000.

The previous prime is 28403647. The next prime is 28403671. The reversal of 28403650 is 5630482.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23050 + ... + 24250.

It is an arithmetic number, because the mean of its divisors is an integer number (1229646).

Almost surely, 2^28403650 is an apocalyptic number.

28403650 is an abundant number, since it is smaller than the sum of its proper divisors (30619358).

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

28403650 is a wasteful number, since it uses less digits than its factorization.

28403650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1267 (or 1262 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 28403650 is about 5329.5074819349. The cubic root of 28403650 is about 305.1111303357. Note that the first 4 decimals are identical.

The spelling of 28403650 in words is "twenty-eight million, four hundred three thousand, six hundred fifty".