28738684 has 24 divisors (see below), whose sum is σ = 56518560. Its totient is φ = 12686784.

The previous prime is 28738657. The next prime is 28738691. The reversal of 28738684 is 48683782.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a congruent number.

It is an unprimeable number.

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, 10819 + ... + 13210.

It is an arithmetic number, because the mean of its divisors is an integer number (2354940).

Almost surely, 2^28738684 is an apocalyptic number.

It is an amenable number.

28738684 is a deficient number, since it is larger than the sum of its proper divisors (27779876).

28738684 is a wasteful number, since it uses less digits than its factorization.

28738684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24069 (or 24067 counting only the distinct ones).

The product of its digits is 516096, while the sum is 46.

The square root of 28738684 is about 5360.8473210865. The cubic root of 28738684 is about 306.3060858546.

The spelling of 28738684 in words is "twenty-eight million, seven hundred thirty-eight thousand, six hundred eighty-four".