22639452 has 48 divisors (see below), whose sum is σ = 60141312. Its totient is φ = 6561280.

The previous prime is 22639439. The next prime is 22639471. The reversal of 22639452 is 25493622.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 693 + ... + 6764.

It is an arithmetic number, because the mean of its divisors is an integer number (1252944).

Almost surely, 2^22639452 is an apocalyptic number.

22639452 is a gapful number since it is divisible by the number (22) 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 22639452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30070656).

22639452 is an abundant number, since it is smaller than the sum of its proper divisors (37501860).

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

22639452 is a wasteful number, since it uses less digits than its factorization.

22639452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7498 (or 7496 counting only the distinct ones).

The product of its digits is 25920, while the sum is 33.

The square root of 22639452 is about 4758.0933156045. The cubic root of 22639452 is about 282.8928494286.

The spelling of 22639452 in words is "twenty-two million, six hundred thirty-nine thousand, four hundred fifty-two".