28251970 has 16 divisors (see below), whose sum is σ = 50935680. Its totient is φ = 11282544.

The previous prime is 28251961. The next prime is 28252009. The reversal of 28251970 is 7915282.

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 7 ways as a sum of consecutive naturals, for example, 5479 + ... + 9301.

It is an arithmetic number, because the mean of its divisors is an integer number (3183480).

Almost surely, 2^28251970 is an apocalyptic number.

28251970 is a deficient number, since it is larger than the sum of its proper divisors (22683710).

28251970 is a wasteful number, since it uses less digits than its factorization.

28251970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4569.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 28251970 is about 5315.2582251477. The cubic root of 28251970 is about 304.5670467285.

The spelling of 28251970 in words is "twenty-eight million, two hundred fifty-one thousand, nine hundred seventy".