23121648 has 90 divisors (see below), whose sum is σ = 71179472. Its totient is φ = 7001280.

The previous prime is 23121643. The next prime is 23121661. The reversal of 23121648 is 84612132.

23121648 is a `hidden beast` number, since 2 + 3 + 12 + 1 + 648 = 666.

It is a super-2 number, since 2×23121648² = 1069221212471808, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23121643) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 16761 + ... + 18087.

Almost surely, 2^23121648 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 23121648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35589736).

23121648 is an abundant number, since it is smaller than the sum of its proper divisors (48057824).

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

23121648 is a wasteful number, since it uses less digits than its factorization.

23121648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1363 (or 1343 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 23121648 is about 4808.4974784230. The cubic root of 23121648 is about 284.8871945070.

The spelling of 23121648 in words is "twenty-three million, one hundred twenty-one thousand, six hundred forty-eight".