28122458 has 32 divisors (see below), whose sum is σ = 52254720. Its totient is φ = 11053440.

The previous prime is 28122443. The next prime is 28122463. The reversal of 28122458 is 85422182.

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, 34358 + ... + 35166.

It is an arithmetic number, because the mean of its divisors is an integer number (1632960).

Almost surely, 2^28122458 is an apocalyptic number.

28122458 is a deficient number, since it is larger than the sum of its proper divisors (24132262).

28122458 is a wasteful number, since it uses less digits than its factorization.

28122458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1022.

The product of its digits is 10240, while the sum is 32.

The square root of 28122458 is about 5303.0611914252. The cubic root of 28122458 is about 304.1009374538.

The spelling of 28122458 in words is "twenty-eight million, one hundred twenty-two thousand, four hundred fifty-eight".