28307814 has 16 divisors (see below), whose sum is σ = 57298752. Its totient is φ = 9322088.

The previous prime is 28307809. The next prime is 28307827. The reversal of 28307814 is 41870382.

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, 27924 + ... + 28919.

It is an arithmetic number, because the mean of its divisors is an integer number (3581172).

Almost surely, 2^28307814 is an apocalyptic number.

28307814 is an abundant number, since it is smaller than the sum of its proper divisors (28990938).

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

28307814 is a wasteful number, since it uses less digits than its factorization.

28307814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56931.

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 28307814 is about 5320.5088102549. The cubic root of 28307814 is about 304.7675878831.

The spelling of 28307814 in words is "twenty-eight million, three hundred seven thousand, eight hundred fourteen".