22040004 has 36 divisors (see below), whose sum is σ = 59824464. Its totient is φ = 6296976.

The previous prime is 22039999. The next prime is 22040009. The reversal of 22040004 is 40004022.

It is an interprime number because it is at equal distance from previous prime (22039999) and next prime (22040009).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (22040009) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18154 + ... + 19329.

Almost surely, 2^22040004 is an apocalyptic number.

It is an amenable number.

22040004 is an abundant number, since it is smaller than the sum of its proper divisors (37784460).

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

22040004 is a wasteful number, since it uses less digits than its factorization.

22040004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37504 (or 37495 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 12.

The square root of 22040004 is about 4694.6782637365. The cubic root of 22040004 is about 280.3736677748.

Adding to 22040004 its reverse (40004022), we get a palindrome (62044026).

The spelling of 22040004 in words is "twenty-two million, forty thousand, four".