28493312 has 80 divisors (see below), whose sum is σ = 62607600. Its totient is φ = 12902400.

The previous prime is 28493303. The next prime is 28493321. The reversal of 28493312 is 21339482.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28493303) and next prime (28493321).

It is a Harshad number since it is a multiple of its sum of digits (32).

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, 282062 + ... + 282162.

It is an arithmetic number, because the mean of its divisors is an integer number (782595).

Almost surely, 2^28493312 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 28493312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31303800).

28493312 is an abundant number, since it is smaller than the sum of its proper divisors (34114288).

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

28493312 is a wasteful number, since it uses less digits than its factorization.

28493312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167 (or 151 counting only the distinct ones).

The product of its digits is 10368, while the sum is 32.

The square root of 28493312 is about 5337.9127006724. The cubic root of 28493312 is about 305.4318419187.

The spelling of 28493312 in words is "twenty-eight million, four hundred ninety-three thousand, three hundred twelve".