28700490 has 64 divisors (see below), whose sum is σ = 84784896. Its totient is φ = 6054912.

The previous prime is 28700489. The next prime is 28700521. The reversal of 28700490 is 9400782.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2527 + ... + 7986.

It is an arithmetic number, because the mean of its divisors is an integer number (1324764).

Almost surely, 2^28700490 is an apocalyptic number.

28700490 is an abundant number, since it is smaller than the sum of its proper divisors (56084406).

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

28700490 is a wasteful number, since it uses less digits than its factorization.

28700490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10543.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 28700490 is about 5357.2838267167. The cubic root of 28700490 is about 306.1703310743.

The spelling of 28700490 in words is "twenty-eight million, seven hundred thousand, four hundred ninety".