22772639 has 4 divisors (see below), whose sum is σ = 24112224. Its totient is φ = 21433056.

The previous prime is 22772591. The next prime is 22772641. The reversal of 22772639 is 93627722.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-22772639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22772689) 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, 669767 + ... + 669800.

It is an arithmetic number, because the mean of its divisors is an integer number (6028056).

Almost surely, 2^22772639 is an apocalyptic number.

22772639 is a deficient number, since it is larger than the sum of its proper divisors (1339585).

22772639 is a wasteful number, since it uses less digits than its factorization.

22772639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1339584.

The product of its digits is 63504, while the sum is 38.

The square root of 22772639 is about 4772.0686290120. The cubic root of 22772639 is about 283.4465142596.

The spelling of 22772639 in words is "twenty-two million, seven hundred seventy-two thousand, six hundred thirty-nine".