28465312 has 48 divisors (see below), whose sum is σ = 58145472. Its totient is φ = 13708800.

The previous prime is 28465309. The next prime is 28465313. The reversal of 28465312 is 21356482.

It is not an unprimeable number, because it can be changed into a prime (28465313) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 188437 + ... + 188587.

It is an arithmetic number, because the mean of its divisors is an integer number (1211364).

Almost surely, 2^28465312 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 28465312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29072736).

28465312 is an abundant number, since it is smaller than the sum of its proper divisors (29680160).

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

28465312 is a wasteful number, since it uses less digits than its factorization.

28465312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341 (or 333 counting only the distinct ones).

The product of its digits is 11520, while the sum is 31.

The square root of 28465312 is about 5335.2893079945. The cubic root of 28465312 is about 305.3317611881.

The spelling of 28465312 in words is "twenty-eight million, four hundred sixty-five thousand, three hundred twelve".