28493712 has 120 divisors (see below), whose sum is σ = 88827648. Its totient is φ = 8467200.

The previous prime is 28493659. The next prime is 28493713. The reversal of 28493712 is 21739482.

28493712 is a `hidden beast` number, since 284 + 9 + 371 + 2 = 666.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

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

It is not an unprimeable number, because it can be changed into a prime (28493713) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 57787 + ... + 58277.

Almost surely, 2^28493712 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 28493712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44413824).

28493712 is an abundant number, since it is smaller than the sum of its proper divisors (60333936).

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

28493712 is a wasteful number, since it uses less digits than its factorization.

28493712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549 (or 540 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 28493712 is about 5337.9501683699. The cubic root of 28493712 is about 305.4332711683.

It can be divided in two parts, 2849 and 3712, that added together give a 8-th power (6561 = 3⁸).

The spelling of 28493712 in words is "twenty-eight million, four hundred ninety-three thousand, seven hundred twelve".