22478880 has 48 divisors (see below), whose sum is σ = 70809984. Its totient is φ = 5994240.

The previous prime is 22478867. The next prime is 22478891. The reversal of 22478880 is 8887422.

It is a tau number, because it is divible by the number of its divisors (48).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22936 + ... + 23895.

It is an arithmetic number, because the mean of its divisors is an integer number (1475208).

Almost surely, 2^22478880 is an apocalyptic number.

22478880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22478880 is an abundant number, since it is smaller than the sum of its proper divisors (48331104).

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

22478880 is a wasteful number, since it uses less digits than its factorization.

22478880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46849 (or 46841 counting only the distinct ones).

The product of its (nonzero) digits is 57344, while the sum is 39.

The square root of 22478880 is about 4741.1897241093. The cubic root of 22478880 is about 282.2224490966. Note that the first 3 decimals are identical.

The spelling of 22478880 in words is "twenty-two million, four hundred seventy-eight thousand, eight hundred eighty".