22747920 has 160 divisors (see below), whose sum is σ = 79494912. Its totient is φ = 5339136.

The previous prime is 22747867. The next prime is 22747931. The reversal of 22747920 is 2974722.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 71602 + ... + 71918.

Almost surely, 2^22747920 is an apocalyptic number.

22747920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22747920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39747456).

22747920 is an abundant number, since it is smaller than the sum of its proper divisors (56746992).

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

22747920 is a wasteful number, since it uses less digits than its factorization.

22747920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369 (or 363 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 33.

The square root of 22747920 is about 4769.4779588546. The cubic root of 22747920 is about 283.3439196352.

The spelling of 22747920 in words is "twenty-two million, seven hundred forty-seven thousand, nine hundred twenty".