22914640 has 160 divisors (see below), whose sum is σ = 67495680. Its totient is φ = 7053312.

The previous prime is 22914637. The next prime is 22914641. The reversal of 22914640 is 4641922.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 22914599 and 22914608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22914641) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 276039 + ... + 276121.

It is an arithmetic number, because the mean of its divisors is an integer number (421848).

Almost surely, 2^22914640 is an apocalyptic number.

22914640 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 22914640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33747840).

22914640 is an abundant number, since it is smaller than the sum of its proper divisors (44581040).

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

22914640 is a wasteful number, since it uses less digits than its factorization.

22914640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149 (or 143 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 22914640 is about 4786.9238556718. The cubic root of 22914640 is about 284.0344466582.

The spelling of 22914640 in words is "twenty-two million, nine hundred fourteen thousand, six hundred forty".