22838721 has 4 divisors (see below), whose sum is σ = 30451632. Its totient is φ = 15225812.

The previous prime is 22838713. The next prime is 22838729. The reversal of 22838721 is 12783822.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (22838713) and next prime (22838729).

It is a cyclic number.

It is not a de Polignac number, because 22838721 - 2³ = 22838713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22838729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3806451 + ... + 3806456.

It is an arithmetic number, because the mean of its divisors is an integer number (7612908).

Almost surely, 2^22838721 is an apocalyptic number.

It is an amenable number.

22838721 is a deficient number, since it is larger than the sum of its proper divisors (7612911).

22838721 is an equidigital number, since it uses as much as digits as its factorization.

22838721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7612910.

The product of its digits is 10752, while the sum is 33.

The square root of 22838721 is about 4778.9874450557. The cubic root of 22838721 is about 283.7204193322.

The spelling of 22838721 in words is "twenty-two million, eight hundred thirty-eight thousand, seven hundred twenty-one".