22002864 has 80 divisors (see below), whose sum is σ = 62933472. Its totient is φ = 6580224.

The previous prime is 22002863. The next prime is 22002887. The reversal of 22002864 is 46820022.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22002863) 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, 22612 + ... + 23564.

Almost surely, 2^22002864 is an apocalyptic number.

22002864 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 22002864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31466736).

22002864 is an abundant number, since it is smaller than the sum of its proper divisors (40930608).

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

22002864 is a wasteful number, since it uses less digits than its factorization.

22002864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1014 (or 1008 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 22002864 is about 4690.7210533137. The cubic root of 22002864 is about 280.2160916904.

Adding to 22002864 its reverse (46820022), we get a palindrome (68822886).

The spelling of 22002864 in words is "twenty-two million, two thousand, eight hundred sixty-four".