28645554 has 16 divisors (see below), whose sum is σ = 65475648. Its totient is φ = 8184432.

The previous prime is 28645531. The next prime is 28645567. The reversal of 28645554 is 45554682.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 340977 + ... + 341060.

It is an arithmetic number, because the mean of its divisors is an integer number (4092228).

Almost surely, 2^28645554 is an apocalyptic number.

28645554 is an abundant number, since it is smaller than the sum of its proper divisors (36830094).

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

28645554 is a wasteful number, since it uses less digits than its factorization.

28645554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 682049.

The product of its digits is 192000, while the sum is 39.

The square root of 28645554 is about 5352.1541457622. The cubic root of 28645554 is about 305.9748580309.

The spelling of 28645554 in words is "twenty-eight million, six hundred forty-five thousand, five hundred fifty-four".