22421672 has 64 divisors (see below), whose sum is σ = 54499200. Its totient is φ = 8398080.

The previous prime is 22421599. The next prime is 22421677. The reversal of 22421672 is 27612422.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22421677) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13022 + ... + 14642.

It is an arithmetic number, because the mean of its divisors is an integer number (851550).

Almost surely, 2^22421672 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22421672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27249600).

22421672 is an abundant number, since it is smaller than the sum of its proper divisors (32077528).

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

22421672 is a wasteful number, since it uses less digits than its factorization.

22421672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1666 (or 1662 counting only the distinct ones).

The product of its digits is 2688, while the sum is 26.

The square root of 22421672 is about 4735.1527958451. The cubic root of 22421672 is about 281.9828301335.

The spelling of 22421672 in words is "twenty-two million, four hundred twenty-one thousand, six hundred seventy-two".