22808742 has 48 divisors (see below), whose sum is σ = 50848560. Its totient is φ = 6814720.

The previous prime is 22808671. The next prime is 22808749. The reversal of 22808742 is 24780822.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22808749) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 64438 + ... + 64790.

It is an arithmetic number, because the mean of its divisors is an integer number (1059345).

Almost surely, 2^22808742 is an apocalyptic number.

22808742 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 22808742, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25424280).

22808742 is an abundant number, since it is smaller than the sum of its proper divisors (28039818).

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

22808742 is a wasteful number, since it uses less digits than its factorization.

22808742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469 (or 458 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 33.

The square root of 22808742 is about 4775.8498720123. The cubic root of 22808742 is about 283.5962241290.

The spelling of 22808742 in words is "twenty-two million, eight hundred eight thousand, seven hundred forty-two".