28876665 has 32 divisors (see below), whose sum is σ = 47784960. Its totient is φ = 14883264.

The previous prime is 28876657. The next prime is 28876667. The reversal of 28876665 is 56667882.

It is not a de Polignac number, because 28876665 - 2³ = 28876657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28876667) 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, 59052 + ... + 59538.

It is an arithmetic number, because the mean of its divisors is an integer number (1493280).

Almost surely, 2^28876665 is an apocalyptic number.

It is an amenable number.

28876665 is a deficient number, since it is larger than the sum of its proper divisors (18908295).

28876665 is a wasteful number, since it uses less digits than its factorization.

28876665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 621.

The product of its digits is 967680, while the sum is 48.

The square root of 28876665 is about 5373.7012384389. The cubic root of 28876665 is about 306.7955186054.

The spelling of 28876665 in words is "twenty-eight million, eight hundred seventy-six thousand, six hundred sixty-five".