28993110 has 32 divisors (see below), whose sum is σ = 72610560. Its totient is φ = 7395168.

The previous prime is 28993103. The next prime is 28993141. The reversal of 28993110 is 1139982.

It is a congruent number.

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, 20320 + ... + 21699.

It is an arithmetic number, because the mean of its divisors is an integer number (2269080).

Almost surely, 2^28993110 is an apocalyptic number.

28993110 is an abundant number, since it is smaller than the sum of its proper divisors (43617450).

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

28993110 is a wasteful number, since it uses less digits than its factorization.

28993110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42052.

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 28993110 is about 5384.5250486928. The cubic root of 28993110 is about 307.2073493047.

It can be divided in two parts, 289931 and 10, that added together give a triangular number (289941 = T₇₆₁).

The spelling of 28993110 in words is "twenty-eight million, nine hundred ninety-three thousand, one hundred ten".