28712490 has 32 divisors (see below), whose sum is σ = 72964800. Its totient is φ = 7206144.

The previous prime is 28712459. The next prime is 28712501. The reversal of 28712490 is 9421782.

It is a happy number.

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 15 ways as a sum of consecutive naturals, for example, 27640 + ... + 28659.

It is an arithmetic number, because the mean of its divisors is an integer number (2280150).

Almost surely, 2^28712490 is an apocalyptic number.

28712490 is an abundant number, since it is smaller than the sum of its proper divisors (44252310).

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

28712490 is a wasteful number, since it uses less digits than its factorization.

28712490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56326.

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 28712490 is about 5358.4036802018. The cubic root of 28712490 is about 306.2129962232.

The spelling of 28712490 in words is "twenty-eight million, seven hundred twelve thousand, four hundred ninety".