28504490 has 16 divisors (see below), whose sum is σ = 58637952. Its totient is φ = 9772944.

The previous prime is 28504459. The next prime is 28504499. The reversal of 28504490 is 9440582.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28504499) 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, 203534 + ... + 203673.

It is an arithmetic number, because the mean of its divisors is an integer number (3664872).

Almost surely, 2^28504490 is an apocalyptic number.

28504490 is an abundant number, since it is smaller than the sum of its proper divisors (30133462).

28504490 is a wasteful number, since it uses less digits than its factorization.

28504490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407221.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 28504490 is about 5338.9596364835. The cubic root of 28504490 is about 305.4717772641.

The spelling of 28504490 in words is "twenty-eight million, five hundred four thousand, four hundred ninety".