28660863 has 32 divisors (see below), whose sum is σ = 48563712. Its totient is φ = 14601600.

The previous prime is 28660837. The next prime is 28660867. The reversal of 28660863 is 36806682.

It is not a de Polignac number, because 28660863 - 2⁶ = 28660799 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28660867) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11073 + ... + 13413.

It is an arithmetic number, because the mean of its divisors is an integer number (1517616).

Almost surely, 2^28660863 is an apocalyptic number.

28660863 is a deficient number, since it is larger than the sum of its proper divisors (19902849).

28660863 is a wasteful number, since it uses less digits than its factorization.

28660863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2415.

The product of its (nonzero) digits is 82944, while the sum is 39.

The square root of 28660863 is about 5353.5841265455. The cubic root of 28660863 is about 306.0293555502.

The spelling of 28660863 in words is "twenty-eight million, six hundred sixty thousand, eight hundred sixty-three".