22888781 has 4 divisors (see below), whose sum is σ = 23004000. Its totient is φ = 22773564.

The previous prime is 22888777. The next prime is 22888793. The reversal of 22888781 is 18788822.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22888781 - 2² = 22888777 is a prime.

It is a super-2 number, since 2×22888781² = 1047792591331922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22888081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57311 + ... + 57708.

It is an arithmetic number, because the mean of its divisors is an integer number (5751000).

Almost surely, 2^22888781 is an apocalyptic number.

It is an amenable number.

22888781 is a deficient number, since it is larger than the sum of its proper divisors (115219).

22888781 is a wasteful number, since it uses less digits than its factorization.

22888781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115218.

The product of its digits is 114688, while the sum is 44.

The square root of 22888781 is about 4784.2220893265. Note that the first 3 decimals coincide. The cubic root of 22888781 is about 283.9275628588.

The spelling of 22888781 in words is "twenty-two million, eight hundred eighty-eight thousand, seven hundred eighty-one".