28620090 has 24 divisors (see below), whose sum is σ = 74412468. Its totient is φ = 7632000.

The previous prime is 28620083. The next prime is 28620101. The reversal of 28620090 is 9002682.

It can be written as a sum of positive squares in 2 ways, for example, as 28291761 + 328329 = 5319^2 + 573^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 158911 + ... + 159090.

Almost surely, 2^28620090 is an apocalyptic number.

28620090 is an abundant number, since it is smaller than the sum of its proper divisors (45792378).

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

28620090 is a wasteful number, since it uses less digits than its factorization.

28620090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318014 (or 318011 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 28620090 is about 5349.7747616138. The cubic root of 28620090 is about 305.8841673593.

The spelling of 28620090 in words is "twenty-eight million, six hundred twenty thousand, ninety".