22971648 has 72 divisors (see below), whose sum is σ = 69888448. Its totient is φ = 6561792.

The previous prime is 22971647. The next prime is 22971667. The reversal of 22971648 is 84617922.

It is a super-2 number, since 2×22971648² = 1055393223671808, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22971643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3240 + ... + 7512.

Almost surely, 2^22971648 is an apocalyptic number.

22971648 is a gapful number since it is divisible by the number (28) 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 22971648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34944224).

22971648 is an abundant number, since it is smaller than the sum of its proper divisors (46916800).

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

22971648 is an equidigital number, since it uses as much as digits as its factorization.

22971648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4299 (or 4285 counting only the distinct ones).

The product of its digits is 48384, while the sum is 39.

The square root of 22971648 is about 4792.8747114858. The cubic root of 22971648 is about 284.2697958550.

The spelling of 22971648 in words is "twenty-two million, nine hundred seventy-one thousand, six hundred forty-eight".