28005154 has 16 divisors (see below), whose sum is σ = 44640288. Its totient is φ = 13131072.

The previous prime is 28005149. The next prime is 28005163. The reversal of 28005154 is 45150082.

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, 9097 + ... + 11779.

It is an arithmetic number, because the mean of its divisors is an integer number (2790018).

Almost surely, 2^28005154 is an apocalyptic number.

28005154 is a deficient number, since it is larger than the sum of its proper divisors (16635134).

28005154 is a wasteful number, since it uses less digits than its factorization.

28005154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3009.

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

The square root of 28005154 is about 5291.9896069437. The cubic root of 28005154 is about 303.6775276868.

The spelling of 28005154 in words is "twenty-eight million, five thousand, one hundred fifty-four".