28360722 has 64 divisors (see below), whose sum is σ = 64963584. Its totient is φ = 8190720.

The previous prime is 28360697. The next prime is 28360727. The reversal of 28360722 is 22706382.

It is a super-2 number, since 2×28360722² = 1608661104722568, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28360722.

It is not an unprimeable number, because it can be changed into a prime (28360727) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 89308 + ... + 89624.

It is an arithmetic number, because the mean of its divisors is an integer number (1015056).

Almost surely, 2^28360722 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28360722, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32481792).

28360722 is an abundant number, since it is smaller than the sum of its proper divisors (36602862).

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

28360722 is a wasteful number, since it uses less digits than its factorization.

28360722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403.

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 28360722 is about 5325.4785700442. The cubic root of 28360722 is about 304.9573424172.

The spelling of 28360722 in words is "twenty-eight million, three hundred sixty thousand, seven hundred twenty-two".