28155002 has 16 divisors (see below), whose sum is σ = 43541160. Its totient is φ = 13644288.

The previous prime is 28154999. The next prime is 28155073. The reversal of 28155002 is 20055182.

It can be written as a sum of positive squares in 4 ways, for example, as 20967241 + 7187761 = 4579^2 + 2681^2 .

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, 24374 + ... + 25502.

Almost surely, 2^28155002 is an apocalyptic number.

28155002 is a deficient number, since it is larger than the sum of its proper divisors (15386158).

28155002 is a wasteful number, since it uses less digits than its factorization.

28155002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1505.

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 28155002 is about 5306.1287206399. The cubic root of 28155002 is about 304.2181965948.

The spelling of 28155002 in words is "twenty-eight million, one hundred fifty-five thousand, two".