22302728 has 32 divisors (see below), whose sum is σ = 47952000. Its totient is φ = 9526272.

The previous prime is 22302701. The next prime is 22302739. The reversal of 22302728 is 82720322.

It is a junction number, because it is equal to n+sod(n) for n = 22302697 and 22302706.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24701 + ... + 25587.

It is an arithmetic number, because the mean of its divisors is an integer number (1498500).

Almost surely, 2^22302728 is an apocalyptic number.

22302728 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

22302728 is an abundant number, since it is smaller than the sum of its proper divisors (25649272).

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

22302728 is a wasteful number, since it uses less digits than its factorization.

22302728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1349 (or 1345 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 22302728 is about 4722.5764154749. The cubic root of 22302728 is about 281.4833186211.

It can be divided in two parts, 2230272 and 8, that multiplied together give a square (17842176 = 4224²).

The spelling of 22302728 in words is "twenty-two million, three hundred two thousand, seven hundred twenty-eight".