22279420 has 12 divisors (see below), whose sum is σ = 46786824. Its totient is φ = 8911760.

The previous prime is 22279409. The next prime is 22279423. The reversal of 22279420 is 2497222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22279423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 556966 + ... + 557005.

It is an arithmetic number, because the mean of its divisors is an integer number (3898902).

Almost surely, 2^22279420 is an apocalyptic number.

22279420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22279420 is an abundant number, since it is smaller than the sum of its proper divisors (24507404).

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

22279420 is a wasteful number, since it uses less digits than its factorization.

22279420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1113980 (or 1113978 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 22279420 is about 4720.1080496107. The cubic root of 22279420 is about 281.3852274813.

The spelling of 22279420 in words is "twenty-two million, two hundred seventy-nine thousand, four hundred twenty".