22219440 has 40 divisors (see below), whose sum is σ = 68881008. Its totient is φ = 5925120.

The previous prime is 22219427. The next prime is 22219447. The reversal of 22219440 is 4491222.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 22219440.

It is not an unprimeable number, because it can be changed into a prime (22219447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46051 + ... + 46530.

Almost surely, 2^22219440 is an apocalyptic number.

22219440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22219440 is an abundant number, since it is smaller than the sum of its proper divisors (46661568).

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

22219440 is a wasteful number, since it uses less digits than its factorization.

22219440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92597 (or 92591 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 22219440 is about 4713.7500994431. The cubic root of 22219440 is about 281.1324881920.

The spelling of 22219440 in words is "twenty-two million, two hundred nineteen thousand, four hundred forty".