22040406 has 24 divisors (see below), whose sum is σ = 49402080. Its totient is φ = 7093296.

The previous prime is 22040393. The next prime is 22040429. The reversal of 22040406 is 60404022.

22040406 is a `hidden beast` number, since 220 + 40 + 406 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20590 + ... + 21633.

It is an arithmetic number, because the mean of its divisors is an integer number (2058420).

Almost surely, 2^22040406 is an apocalyptic number.

22040406 is an abundant number, since it is smaller than the sum of its proper divisors (27361674).

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

22040406 is a wasteful number, since it uses less digits than its factorization.

22040406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42260 (or 42257 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 22040406 is about 4694.7210779768. The cubic root of 22040406 is about 280.3753723953.

Adding to 22040406 its reverse (60404022), we get a palindrome (82444428).

The spelling of 22040406 in words is "twenty-two million, forty thousand, four hundred six".