22780538 has 8 divisors (see below), whose sum is σ = 37277280. Its totient is φ = 10354780.

The previous prime is 22780523. The next prime is 22780559. The reversal of 22780538 is 83508722.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 22780498 and 22780507.

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, 517718 + ... + 517761.

It is an arithmetic number, because the mean of its divisors is an integer number (4659660).

Almost surely, 2^22780538 is an apocalyptic number.

22780538 is a deficient number, since it is larger than the sum of its proper divisors (14496742).

22780538 is a wasteful number, since it uses less digits than its factorization.

22780538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1035492.

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 22780538 is about 4772.8961857556. The cubic root of 22780538 is about 283.4792828992.

The spelling of 22780538 in words is "twenty-two million, seven hundred eighty thousand, five hundred thirty-eight".