22778329 has 8 divisors (see below), whose sum is σ = 26667648. Its totient is φ = 19047840.

The previous prime is 22778309. The next prime is 22778333. The reversal of 22778329 is 92387722.

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

It is not a de Polignac number, because 22778329 - 2⁹ = 22777817 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22778291 and 22778300.

It is not an unprimeable number, because it can be changed into a prime (22778309) 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, 39397 + ... + 39970.

It is an arithmetic number, because the mean of its divisors is an integer number (3333456).

Almost surely, 2^22778329 is an apocalyptic number.

It is an amenable number.

22778329 is a deficient number, since it is larger than the sum of its proper divisors (3889319).

22778329 is an equidigital number, since it uses as much as digits as its factorization.

22778329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79415.

The product of its digits is 84672, while the sum is 40.

The square root of 22778329 is about 4772.6647692877. The cubic root of 22778329 is about 283.4701197270.

The spelling of 22778329 in words is "twenty-two million, seven hundred seventy-eight thousand, three hundred twenty-nine".