22961780 has 12 divisors (see below), whose sum is σ = 48219780. Its totient is φ = 9184704.

The previous prime is 22961779. The next prime is 22961791. The reversal of 22961780 is 8716922.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 9972964 + 12988816 = 3158^2 + 3604^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 22961780.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 574025 + ... + 574064.

It is an arithmetic number, because the mean of its divisors is an integer number (4018315).

Almost surely, 2^22961780 is an apocalyptic number.

22961780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22961780 is an abundant number, since it is smaller than the sum of its proper divisors (25258000).

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

22961780 is a wasteful number, since it uses less digits than its factorization.

22961780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1148098 (or 1148096 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 22961780 is about 4791.8451560959. The cubic root of 22961780 is about 284.2290851477.

The spelling of 22961780 in words is "twenty-two million, nine hundred sixty-one thousand, seven hundred eighty".