28477312 has 64 divisors (see below), whose sum is σ = 62791200. Its totient is φ = 12795904.

The previous prime is 28477307. The next prime is 28477349. The reversal of 28477312 is 21377482.

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

It is a Harshad number since it is a multiple of its sum of digits (34).

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, 49764 + ... + 50332.

Almost surely, 2^28477312 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 28477312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31395600).

28477312 is an abundant number, since it is smaller than the sum of its proper divisors (34313888).

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

28477312 is a wasteful number, since it uses less digits than its factorization.

28477312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 623 (or 611 counting only the distinct ones).

The product of its digits is 18816, while the sum is 34.

The square root of 28477312 is about 5336.4137770604. The cubic root of 28477312 is about 305.3746609624.

The spelling of 28477312 in words is "twenty-eight million, four hundred seventy-seven thousand, three hundred twelve".