28490518 has 16 divisors (see below), whose sum is σ = 50161824. Its totient is φ = 11880000.

The previous prime is 28490509. The next prime is 28490533. The reversal of 28490518 is 81509482.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26983 + ... + 28018.

It is an arithmetic number, because the mean of its divisors is an integer number (3135114).

Almost surely, 2^28490518 is an apocalyptic number.

28490518 is a deficient number, since it is larger than the sum of its proper divisors (21671306).

28490518 is a wasteful number, since it uses less digits than its factorization.

28490518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55047.

The product of its (nonzero) digits is 23040, while the sum is 37.

The square root of 28490518 is about 5337.6509814712. The cubic root of 28490518 is about 305.4218582371.

The spelling of 28490518 in words is "twenty-eight million, four hundred ninety thousand, five hundred eighteen".