28814140 has 12 divisors (see below), whose sum is σ = 60509736. Its totient is φ = 11525648.

The previous prime is 28814131. The next prime is 28814173. The reversal of 28814140 is 4141882.

It is a junction number, because it is equal to n+sod(n) for n = 28814099 and 28814108.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 720334 + ... + 720373.

It is an arithmetic number, because the mean of its divisors is an integer number (5042478).

Almost surely, 2^28814140 is an apocalyptic number.

28814140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28814140 is an abundant number, since it is smaller than the sum of its proper divisors (31695596).

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

28814140 is a wasteful number, since it uses less digits than its factorization.

28814140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1440716 (or 1440714 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 28.

The square root of 28814140 is about 5367.8804010522. The cubic root of 28814140 is about 306.5739296358.

It can be divided in two parts, 2881 and 4140, that added together give a triangular number (7021 = T₁₁₈).

The spelling of 28814140 in words is "twenty-eight million, eight hundred fourteen thousand, one hundred forty".