22405770 has 48 divisors (see below), whose sum is σ = 58553352. Its totient is φ = 5944320.

The previous prime is 22405729. The next prime is 22405771. The reversal of 22405770 is 7750422.

It can be written as a sum of positive squares in 4 ways, for example, as 22382361 + 23409 = 4731^2 + 153^2 .

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (22405771) 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, 21174 + ... + 22206.

Almost surely, 2^22405770 is an apocalyptic number.

22405770 is an abundant number, since it is smaller than the sum of its proper divisors (36147582).

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

22405770 is a wasteful number, since it uses less digits than its factorization.

22405770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1287 (or 1284 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 27.

The square root of 22405770 is about 4733.4733547365. The cubic root of 22405770 is about 281.9161513199.

The spelling of 22405770 in words is "twenty-two million, four hundred five thousand, seven hundred seventy".