28242736 has 20 divisors (see below), whose sum is σ = 56486464. Its totient is φ = 13665600.

The previous prime is 28242719. The next prime is 28242743. The reversal of 28242736 is 63724282.

28242736 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27975 + ... + 28966.

Almost surely, 2^28242736 is an apocalyptic number.

It is an amenable number.

28242736 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

28242736 is a wasteful number, since it uses less digits than its factorization.

28242736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56980 (or 56974 counting only the distinct ones).

The product of its digits is 32256, while the sum is 34.

The square root of 28242736 is about 5314.3895227956. The cubic root of 28242736 is about 304.5338610949.

The spelling of 28242736 in words is "twenty-eight million, two hundred forty-two thousand, seven hundred thirty-six".