28977866 has 16 divisors (see below), whose sum is σ = 44193600. Its totient is φ = 14248608.

The previous prime is 28977863. The next prime is 28977881. The reversal of 28977866 is 66877982.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (28977863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46505 + ... + 47123.

It is an arithmetic number, because the mean of its divisors is an integer number (2762100).

Almost surely, 2^28977866 is an apocalyptic number.

28977866 is a deficient number, since it is larger than the sum of its proper divisors (15215734).

28977866 is a wasteful number, since it uses less digits than its factorization.

28977866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 973.

The product of its digits is 2032128, while the sum is 53.

The square root of 28977866 is about 5383.1093245447. The cubic root of 28977866 is about 307.1534986964.

The spelling of 28977866 in words is "twenty-eight million, nine hundred seventy-seven thousand, eight hundred sixty-six".