22149280 has 24 divisors (see below), whose sum is σ = 52328052. Its totient is φ = 8859648.

The previous prime is 22149251. The next prime is 22149287. The reversal of 22149280 is 8294122.

It can be written as a sum of positive squares in 2 ways, for example, as 20178064 + 1971216 = 4492^2 + 1404^2 .

It is not an unprimeable number, because it can be changed into a prime (22149287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69057 + ... + 69376.

Almost surely, 2^22149280 is an apocalyptic number.

22149280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22149280 is an abundant number, since it is smaller than the sum of its proper divisors (30178772).

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

22149280 is a wasteful number, since it uses less digits than its factorization.

22149280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138448 (or 138440 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 22149280 is about 4706.3021577455. The cubic root of 22149280 is about 280.8362753221.

The spelling of 22149280 in words is "twenty-two million, one hundred forty-nine thousand, two hundred eighty".