22649780 has 24 divisors (see below), whose sum is σ = 50363208. Its totient is φ = 8526848.

The previous prime is 22649773. The next prime is 22649789. The reversal of 22649780 is 8794622.

It can be written as a sum of positive squares in 4 ways, for example, as 163216 + 22486564 = 404^2 + 4742^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22649789) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32969 + ... + 33648.

It is an arithmetic number, because the mean of its divisors is an integer number (2098467).

Almost surely, 2^22649780 is an apocalyptic number.

22649780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22649780 is an abundant number, since it is smaller than the sum of its proper divisors (27713428).

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

22649780 is a wasteful number, since it uses less digits than its factorization.

22649780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66643 (or 66641 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 22649780 is about 4759.1785005398. The cubic root of 22649780 is about 282.9358609698.

The spelling of 22649780 in words is "twenty-two million, six hundred forty-nine thousand, seven hundred eighty".