28486744 has 64 divisors (see below), whose sum is σ = 64542240. Its totient is φ = 11612160.

The previous prime is 28486741. The next prime is 28486751. The reversal of 28486744 is 44768482.

It is a super-2 number, since 2×28486744² = 1622989167443072, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28486744.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28486741) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41992 + ... + 42664.

Almost surely, 2^28486744 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 28486744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32271120).

28486744 is an abundant number, since it is smaller than the sum of its proper divisors (36055496).

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

28486744 is a wasteful number, since it uses less digits than its factorization.

28486744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 740 (or 736 counting only the distinct ones).

The product of its digits is 344064, while the sum is 43.

The square root of 28486744 is about 5337.2974434633. The cubic root of 28486744 is about 305.4083717268.

The spelling of 28486744 in words is "twenty-eight million, four hundred eighty-six thousand, seven hundred forty-four".