22779450 has 72 divisors (see below), whose sum is σ = 61746048. Its totient is φ = 6020640.

The previous prime is 22779437. The next prime is 22779467. The reversal of 22779450 is 5497722.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 100237 + ... + 100463.

It is an arithmetic number, because the mean of its divisors is an integer number (857584).

Almost surely, 2^22779450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22779450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30873024).

22779450 is an abundant number, since it is smaller than the sum of its proper divisors (38966598).

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

22779450 is a wasteful number, since it uses less digits than its factorization.

22779450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468 (or 460 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

The square root of 22779450 is about 4772.7822074761. The cubic root of 22779450 is about 283.4747698309.

The spelling of 22779450 in words is "twenty-two million, seven hundred seventy-nine thousand, four hundred fifty".