22078380 has 96 divisors (see below), whose sum is σ = 66044160. Its totient is φ = 5495040.

The previous prime is 22078379. The next prime is 22078471. The reversal of 22078380 is 8387022.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 121890 + ... + 122070.

It is an arithmetic number, because the mean of its divisors is an integer number (687960).

Almost surely, 2^22078380 is an apocalyptic number.

22078380 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 22078380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33022080).

22078380 is an abundant number, since it is smaller than the sum of its proper divisors (43965780).

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

22078380 is a wasteful number, since it uses less digits than its factorization.

22078380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319 (or 317 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 22078380 is about 4698.7636671788. The cubic root of 22078380 is about 280.5363020622.

The spelling of 22078380 in words is "twenty-two million, seventy-eight thousand, three hundred eighty".