28797312 has 64 divisors (see below), whose sum is σ = 80539200. Its totient is φ = 9091584.

The previous prime is 28797283. The next prime is 28797343. The reversal of 28797312 is 21379782.

It is a tau number, because it is divible by the number of its divisors (64).

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, 5323 + ... + 9269.

It is an arithmetic number, because the mean of its divisors is an integer number (1258425).

Almost surely, 2^28797312 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 28797312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40269600).

28797312 is an abundant number, since it is smaller than the sum of its proper divisors (51741888).

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

28797312 is a wasteful number, since it uses less digits than its factorization.

28797312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3983 (or 3971 counting only the distinct ones).

The product of its digits is 42336, while the sum is 39.

The square root of 28797312 is about 5366.3127005422. The cubic root of 28797312 is about 306.5142363656.

The spelling of 28797312 in words is "twenty-eight million, seven hundred ninety-seven thousand, three hundred twelve".