28149290 has 32 divisors (see below), whose sum is σ = 54867456. Its totient is φ = 10336320.

The previous prime is 28149281. The next prime is 28149337. The reversal of 28149290 is 9294182.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 28149290.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28505 + ... + 29475.

It is an arithmetic number, because the mean of its divisors is an integer number (1714608).

Almost surely, 2^28149290 is an apocalyptic number.

28149290 is a deficient number, since it is larger than the sum of its proper divisors (26718166).

28149290 is a wasteful number, since it uses less digits than its factorization.

28149290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1214.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 28149290 is about 5305.5904478201. The cubic root of 28149290 is about 304.1976222535.

The spelling of 28149290 in words is "twenty-eight million, one hundred forty-nine thousand, two hundred ninety".