28312655 has 16 divisors (see below), whose sum is σ = 40518144. Its totient is φ = 18569760.

The previous prime is 28312639. The next prime is 28312681. The reversal of 28312655 is 55621382.

It is not a de Polignac number, because 28312655 - 2⁴ = 28312639 is a prime.

It is a Duffinian number.

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, 16781 + ... + 18390.

It is an arithmetic number, because the mean of its divisors is an integer number (2532384).

Almost surely, 2^28312655 is an apocalyptic number.

28312655 is a deficient number, since it is larger than the sum of its proper divisors (12205489).

28312655 is a wasteful number, since it uses less digits than its factorization.

28312655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35206.

The product of its digits is 14400, while the sum is 32.

The square root of 28312655 is about 5320.9637284988. The cubic root of 28312655 is about 304.7849599509.

The spelling of 28312655 in words is "twenty-eight million, three hundred twelve thousand, six hundred fifty-five".