28070744 has 32 divisors (see below), whose sum is σ = 58008720. Its totient is φ = 12652416.

The previous prime is 28070737. The next prime is 28070759. The reversal of 28070744 is 44707082.

It is a self number, because there is not a number n which added to its sum of digits gives 28070744.

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, 1334 + ... + 7610.

Almost surely, 2^28070744 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28070744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29004360).

28070744 is an abundant number, since it is smaller than the sum of its proper divisors (29937976).

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

28070744 is a wasteful number, since it uses less digits than its factorization.

28070744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6339 (or 6335 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 32.

The square root of 28070744 is about 5298.1830847943. The cubic root of 28070744 is about 303.9144207400.

The spelling of 28070744 in words is "twenty-eight million, seventy thousand, seven hundred forty-four".