28877686 has 24 divisors (see below), whose sum is σ = 45586800. Its totient is φ = 13714272.

The previous prime is 28877677. The next prime is 28877689. The reversal of 28877686 is 68677882.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28877689) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 145015 + ... + 145213.

It is an arithmetic number, because the mean of its divisors is an integer number (1899450).

Almost surely, 2^28877686 is an apocalyptic number.

28877686 is a deficient number, since it is larger than the sum of its proper divisors (16709114).

28877686 is a wasteful number, since it uses less digits than its factorization.

28877686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328 (or 291 counting only the distinct ones).

The product of its digits is 1806336, while the sum is 52.

The square root of 28877686 is about 5373.7962372982. The cubic root of 28877686 is about 306.7991343799.

The spelling of 28877686 in words is "twenty-eight million, eight hundred seventy-seven thousand, six hundred eighty-six".