22881864 has 48 divisors (see below), whose sum is σ = 60786000. Its totient is φ = 7176448.

The previous prime is 22881863. The next prime is 22881917. The reversal of 22881864 is 46818822.

It is a super-2 number, since 2×22881864² = 1047159400228992, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (22881863) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 5287 + ... + 8585.

It is an arithmetic number, because the mean of its divisors is an integer number (1266375).

Almost surely, 2^22881864 is an apocalyptic number.

22881864 is a gapful number since it is divisible by the number (24) 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 22881864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30393000).

22881864 is an abundant number, since it is smaller than the sum of its proper divisors (37904136).

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

22881864 is a wasteful number, since it uses less digits than its factorization.

22881864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3342 (or 3321 counting only the distinct ones).

The product of its digits is 49152, while the sum is 39.

The square root of 22881864 is about 4783.4991376606. The cubic root of 22881864 is about 283.8989589645.

The spelling of 22881864 in words is "twenty-two million, eight hundred eighty-one thousand, eight hundred sixty-four".