28140154 has 32 divisors (see below), whose sum is σ = 49746816. Its totient is φ = 11689920.

The previous prime is 28140143. The next prime is 28140187. The reversal of 28140154 is 45104182.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70684 + ... + 71080.

It is an arithmetic number, because the mean of its divisors is an integer number (1554588).

Almost surely, 2^28140154 is an apocalyptic number.

28140154 is a deficient number, since it is larger than the sum of its proper divisors (21606662).

28140154 is a wasteful number, since it uses less digits than its factorization.

28140154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550.

The product of its (nonzero) digits is 1280, while the sum is 25.

The square root of 28140154 is about 5304.7293993191. The cubic root of 28140154 is about 304.1647090468.

The spelling of 28140154 in words is "twenty-eight million, one hundred forty thousand, one hundred fifty-four".