22072732 has 48 divisors (see below), whose sum is σ = 46593792. Its totient is φ = 9025280.

The previous prime is 22072723. The next prime is 22072733. The reversal of 22072732 is 23727022.

It is a junction number, because it is equal to n+sod(n) for n = 22072697 and 22072706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22072733) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16563 + ... + 17845.

It is an arithmetic number, because the mean of its divisors is an integer number (970704).

Almost surely, 2^22072732 is an apocalyptic number.

22072732 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

22072732 is an abundant number, since it is smaller than the sum of its proper divisors (24521060).

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

22072732 is a wasteful number, since it uses less digits than its factorization.

22072732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1338 (or 1336 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 25.

The square root of 22072732 is about 4698.1626195780. The cubic root of 22072732 is about 280.5123781426.

Adding to 22072732 its reverse (23727022), we get a palindrome (45799754).

The spelling of 22072732 in words is "twenty-two million, seventy-two thousand, seven hundred thirty-two".