28300055 has 16 divisors (see below), whose sum is σ = 40065024. Its totient is φ = 18779040.

The previous prime is 28300043. The next prime is 28300093. The reversal of 28300055 is 55000382.

It is a de Polignac number, because none of the positive numbers 2^k-28300055 is a prime.

It is a super-2 number, since 2×28300055² = 1601786226006050, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28300055.

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, 11957 + ... + 14126.

It is an arithmetic number, because the mean of its divisors is an integer number (2504064).

Almost surely, 2^28300055 is an apocalyptic number.

28300055 is a deficient number, since it is larger than the sum of its proper divisors (11764969).

28300055 is a wasteful number, since it uses less digits than its factorization.

28300055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26126.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 28300055 is about 5319.7796006978. The cubic root of 28300055 is about 304.7397403566.

The spelling of 28300055 in words is "twenty-eight million, three hundred thousand, fifty-five".