22072940 has 24 divisors (see below), whose sum is σ = 46548432. Its totient is φ = 8792000.

The previous prime is 22072933. The next prime is 22072943. The reversal of 22072940 is 4927022.

It is not an unprimeable number, because it can be changed into a prime (22072943) 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, 2822 + ... + 7218.

It is an arithmetic number, because the mean of its divisors is an integer number (1939518).

Almost surely, 2^22072940 is an apocalyptic number.

22072940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22072940 is an abundant number, since it is smaller than the sum of its proper divisors (24475492).

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

22072940 is a wasteful number, since it uses less digits than its factorization.

22072940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4657 (or 4655 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 22072940 is about 4698.1847558392. The cubic root of 22072940 is about 280.5132592658.

Adding to 22072940 its reverse (4927022), we get a palindrome (26999962).

The spelling of 22072940 in words is "twenty-two million, seventy-two thousand, nine hundred forty".