22220780 has 24 divisors (see below), whose sum is σ = 47546352. Its totient is φ = 8720192.

The previous prime is 22220777. The next prime is 22220791. The reversal of 22220780 is 8702222.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9422 + ... + 11541.

It is an arithmetic number, because the mean of its divisors is an integer number (1981098).

Almost surely, 2^22220780 is an apocalyptic number.

22220780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22220780 is an abundant number, since it is smaller than the sum of its proper divisors (25325572).

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

22220780 is a wasteful number, since it uses less digits than its factorization.

22220780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21025 (or 21023 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 23.

The square root of 22220780 is about 4713.8922346613. The cubic root of 22220780 is about 281.1381395490.

The spelling of 22220780 in words is "twenty-two million, two hundred twenty thousand, seven hundred eighty".