22309980 has 144 divisors (see below), whose sum is σ = 78650880. Its totient is φ = 4625280.

The previous prime is 22309943. The next prime is 22310017. The reversal of 22309980 is 8990322.

It is an interprime number because it is at equal distance from previous prime (22309943) and next prime (22310017).

It is a super-3 number, since 3×22309980³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 50601 + ... + 51039.

Almost surely, 2^22309980 is an apocalyptic number.

22309980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22309980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39325440).

22309980 is an abundant number, since it is smaller than the sum of its proper divisors (56340900).

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

22309980 is a wasteful number, since it uses less digits than its factorization.

22309980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480 (or 467 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 22309980 is about 4723.3441543042. The cubic root of 22309980 is about 281.5138245427.

The spelling of 22309980 in words is "twenty-two million, three hundred nine thousand, nine hundred eighty".