28877564 has 6 divisors (see below), whose sum is σ = 50535744. Its totient is φ = 14438780.

The previous prime is 28877561. The next prime is 28877567. The reversal of 28877564 is 46577882.

It is an interprime number because it is at equal distance from previous prime (28877561) and next prime (28877567).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28877561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3609692 + ... + 3609699.

It is an arithmetic number, because the mean of its divisors is an integer number (8422624).

Almost surely, 2^28877564 is an apocalyptic number.

It is an amenable number.

28877564 is a deficient number, since it is larger than the sum of its proper divisors (21658180).

28877564 is a wasteful number, since it uses less digits than its factorization.

28877564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7219395 (or 7219393 counting only the distinct ones).

The product of its digits is 752640, while the sum is 47.

The square root of 28877564 is about 5373.7848859068. The cubic root of 28877564 is about 306.7987023330.

The spelling of 28877564 in words is "twenty-eight million, eight hundred seventy-seven thousand, five hundred sixty-four".