22148940 has 96 divisors (see below), whose sum is σ = 69560064. Its totient is φ = 5218560.

The previous prime is 22148939. The next prime is 22148963. The reversal of 22148940 is 4984122.

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

It is a junction number, because it is equal to n+sod(n) for n = 22148898 and 22148907.

It is a congruent number.

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, 23967 + ... + 24873.

It is an arithmetic number, because the mean of its divisors is an integer number (724584).

Almost surely, 2^22148940 is an apocalyptic number.

22148940 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 22148940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34780032).

22148940 is an abundant number, since it is smaller than the sum of its proper divisors (47411124).

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

22148940 is a wasteful number, since it uses less digits than its factorization.

22148940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 967 (or 965 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 22148940 is about 4706.2660358293. The cubic root of 22148940 is about 280.8348383330.

The spelling of 22148940 in words is "twenty-two million, one hundred forty-eight thousand, nine hundred forty".