28159704 has 32 divisors (see below), whose sum is σ = 78222000. Its totient is φ = 9386496.

The previous prime is 28159699. The next prime is 28159723. The reversal of 28159704 is 40795182.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64969 + ... + 65400.

Almost surely, 2^28159704 is an apocalyptic number.

28159704 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28159704 is an abundant number, since it is smaller than the sum of its proper divisors (50062296).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28159704 is a wasteful number, since it uses less digits than its factorization.

28159704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130384 (or 130374 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 28159704 is about 5306.5717746960. The cubic root of 28159704 is about 304.2351308781.

The spelling of 28159704 in words is "twenty-eight million, one hundred fifty-nine thousand, seven hundred four".