28313768 has 24 divisors (see below), whose sum is σ = 61756650. Its totient is φ = 12134304.

The previous prime is 28313767. The next prime is 28313771. The reversal of 28313768 is 86731382.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 27269284 + 1044484 = 5222^2 + 1022^2 .

It is not an unprimeable number, because it can be changed into a prime (28313767) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 35723 + ... + 36506.

Almost surely, 2^28313768 is an apocalyptic number.

28313768 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28313768 is an abundant number, since it is smaller than the sum of its proper divisors (33442882).

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

28313768 is a wasteful number, since it uses less digits than its factorization.

28313768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72249 (or 72238 counting only the distinct ones).

The product of its digits is 48384, while the sum is 38.

The square root of 28313768 is about 5321.0683137881. The cubic root of 28313768 is about 304.7889537035.

The spelling of 28313768 in words is "twenty-eight million, three hundred thirteen thousand, seven hundred sixty-eight".