28158154 has 16 divisors (see below), whose sum is σ = 44857800. Its totient is φ = 13210624.

The previous prime is 28158083. The next prime is 28158173. The reversal of 28158154 is 45185182.

It can be written as a sum of positive squares in 4 ways, for example, as 21372129 + 6786025 = 4623^2 + 2605^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12162 + ... + 14290.

Almost surely, 2^28158154 is an apocalyptic number.

28158154 is a deficient number, since it is larger than the sum of its proper divisors (16699646).

28158154 is a wasteful number, since it uses less digits than its factorization.

28158154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2537.

The product of its digits is 12800, while the sum is 34.

The square root of 28158154 is about 5306.4257273611. The cubic root of 28158154 is about 304.2295487514.

The spelling of 28158154 in words is "twenty-eight million, one hundred fifty-eight thousand, one hundred fifty-four".