28713788 has 24 divisors (see below), whose sum is σ = 53692800. Its totient is φ = 13395888.

The previous prime is 28713787. The next prime is 28713827. The reversal of 28713788 is 88731782.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28713787) 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, 2273 + ... + 7911.

It is an arithmetic number, because the mean of its divisors is an integer number (2237200).

Almost surely, 2^28713788 is an apocalyptic number.

It is an amenable number.

28713788 is a deficient number, since it is larger than the sum of its proper divisors (24979012).

28713788 is a wasteful number, since it uses less digits than its factorization.

28713788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5729 (or 5727 counting only the distinct ones).

The product of its digits is 150528, while the sum is 44.

The square root of 28713788 is about 5358.5247969940. The cubic root of 28713788 is about 306.2176104576.

The spelling of 28713788 in words is "twenty-eight million, seven hundred thirteen thousand, seven hundred eighty-eight".