22379640 has 64 divisors (see below), whose sum is σ = 67478400. Its totient is φ = 5937792.

The previous prime is 22379629. The next prime is 22379689. The reversal of 22379640 is 4697322.

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, 33631 + ... + 34289.

It is an arithmetic number, because the mean of its divisors is an integer number (1054350).

Almost surely, 2^22379640 is an apocalyptic number.

22379640 is a gapful number since it is divisible by the number (20) 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 22379640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33739200).

22379640 is an abundant number, since it is smaller than the sum of its proper divisors (45098760).

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

22379640 is a wasteful number, since it uses less digits than its factorization.

22379640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 956 (or 952 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 33.

The square root of 22379640 is about 4730.7124199215. The cubic root of 22379640 is about 281.8065168445.

The spelling of 22379640 in words is "twenty-two million, three hundred seventy-nine thousand, six hundred forty".