28938312 has 96 divisors (see below), whose sum is σ = 86486400. Its totient is φ = 8684928.

The previous prime is 28938307. The next prime is 28938313. The reversal of 28938312 is 21383982.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (28938313) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39889 + ... + 40607.

It is an arithmetic number, because the mean of its divisors is an integer number (900900).

Almost surely, 2^28938312 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 28938312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43243200).

28938312 is an abundant number, since it is smaller than the sum of its proper divisors (57548088).

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

28938312 is a wasteful number, since it uses less digits than its factorization.

28938312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 787 (or 780 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 28938312 is about 5379.4341709886. The cubic root of 28938312 is about 307.0136830013.

The spelling of 28938312 in words is "twenty-eight million, nine hundred thirty-eight thousand, three hundred twelve".