22061778 has 8 divisors (see below), whose sum is σ = 44123568. Its totient is φ = 7353924.

The previous prime is 22061771. The next prime is 22061803. The reversal of 22061778 is 87716022.

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

22061778 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (22061771) 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, 1838476 + ... + 1838487.

It is an arithmetic number, because the mean of its divisors is an integer number (5515446).

Almost surely, 2^22061778 is an apocalyptic number.

22061778 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

22061778 is a wasteful number, since it uses less digits than its factorization.

22061778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3676968.

The product of its (nonzero) digits is 9408, while the sum is 33.

The square root of 22061778 is about 4696.9967000201. The cubic root of 22061778 is about 280.4659673188.

The spelling of 22061778 in words is "twenty-two million, sixty-one thousand, seven hundred seventy-eight".