28493748 has 48 divisors (see below), whose sum is σ = 74309760. Its totient is φ = 9441792.

The previous prime is 28493723. The next prime is 28493761. The reversal of 28493748 is 84739482.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20161 + ... + 21527.

It is an arithmetic number, because the mean of its divisors is an integer number (1548120).

Almost surely, 2^28493748 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 28493748, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37154880).

28493748 is an abundant number, since it is smaller than the sum of its proper divisors (45816012).

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

28493748 is a wasteful number, since it uses less digits than its factorization.

28493748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1573 (or 1565 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The square root of 28493748 is about 5337.9535404497. The cubic root of 28493748 is about 305.4333998001.

It can be divided in two parts, 28493 and 748, that added together give a square (29241 = 171²).

The spelling of 28493748 in words is "twenty-eight million, four hundred ninety-three thousand, seven hundred forty-eight".