22040312 has 16 divisors (see below), whose sum is σ = 47229360. Its totient is φ = 9445824.

The previous prime is 22040303. The next prime is 22040353. The reversal of 22040312 is 21304022.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 196733 + ... + 196844.

It is an arithmetic number, because the mean of its divisors is an integer number (2951835).

Almost surely, 2^22040312 is an apocalyptic number.

It is an amenable number.

22040312 is an abundant number, since it is smaller than the sum of its proper divisors (25189048).

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

22040312 is a wasteful number, since it uses less digits than its factorization.

22040312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393590 (or 393586 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 22040312 is about 4694.7110667218. The cubic root of 22040312 is about 280.3749738043.

Adding to 22040312 its reverse (21304022), we get a palindrome (43344334).

The spelling of 22040312 in words is "twenty-two million, forty thousand, three hundred twelve".