28505122 has 4 divisors (see below), whose sum is σ = 42757686. Its totient is φ = 14252560.

The previous prime is 28505093. The next prime is 28505153. The reversal of 28505122 is 22150582.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 14584761 + 13920361 = 3819^2 + 3731^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7126279 + ... + 7126282.

Almost surely, 2^28505122 is an apocalyptic number.

28505122 is a deficient number, since it is larger than the sum of its proper divisors (14252564).

28505122 is a wasteful number, since it uses less digits than its factorization.

28505122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14252563.

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 28505122 is about 5339.0188237166. The cubic root of 28505122 is about 305.4740348820.

The spelling of 28505122 in words is "twenty-eight million, five hundred five thousand, one hundred twenty-two".