28701968 has 20 divisors (see below), whose sum is σ = 56967708. Its totient is φ = 14000640.

The previous prime is 28701949. The next prime is 28701997. The reversal of 28701968 is 86910782.

It can be written as a sum of positive squares in 2 ways, for example, as 6310144 + 22391824 = 2512^2 + 4732^2 .

It is a Harshad number since it is a multiple of its sum of digits (41).

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 3 ways as a sum of consecutive naturals, for example, 21221 + ... + 22532.

Almost surely, 2^28701968 is an apocalyptic number.

It is an amenable number.

28701968 is a deficient number, since it is larger than the sum of its proper divisors (28265740).

28701968 is a wasteful number, since it uses less digits than its factorization.

28701968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43802 (or 43796 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 28701968 is about 5357.4217679776. The cubic root of 28701968 is about 306.1755866406.

The spelling of 28701968 in words is "twenty-eight million, seven hundred one thousand, nine hundred sixty-eight".