22729088 has 64 divisors (see below), whose sum is σ = 47809440. Its totient is φ = 10752000.

The previous prime is 22729079. The next prime is 22729093. The reversal of 22729088 is 88092722.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×22729088² = 1033222882623488, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 320093 + ... + 320163.

Almost surely, 2^22729088 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 22729088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23904720).

22729088 is an abundant number, since it is smaller than the sum of its proper divisors (25080352).

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

22729088 is an equidigital number, since it uses as much as digits as its factorization.

22729088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187 (or 175 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 22729088 is about 4767.5033298363. The cubic root of 22729088 is about 283.2657087360.

It can be divided in two parts, 2272 and 9088, that multiplied together give a square (20647936 = 4544²).

The spelling of 22729088 in words is "twenty-two million, seven hundred twenty-nine thousand, eighty-eight".