28140774 has 16 divisors (see below), whose sum is σ = 57344112. Its totient is φ = 9203168.

The previous prime is 28140743. The next prime is 28140781. The reversal of 28140774 is 47704182.

It is a super-2 number, since 2×28140774² = 1583806322638152, which contains 22 as substring.

It is a Curzon number.

It is a congruent 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, 43929 + ... + 44564.

It is an arithmetic number, because the mean of its divisors is an integer number (3584007).

Almost surely, 2^28140774 is an apocalyptic number.

28140774 is an abundant number, since it is smaller than the sum of its proper divisors (29203338).

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

28140774 is a wasteful number, since it uses less digits than its factorization.

28140774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88551.

The product of its (nonzero) digits is 12544, while the sum is 33.

The square root of 28140774 is about 5304.7878374163. The cubic root of 28140774 is about 304.1669428742.

The spelling of 28140774 in words is "twenty-eight million, one hundred forty thousand, seven hundred seventy-four".