22078819 has 8 divisors (see below), whose sum is σ = 25263360. Its totient is φ = 18901896.

The previous prime is 22078813. The next prime is 22078843. The reversal of 22078819 is 91887022.

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

It is a cyclic number.

It is not a de Polignac number, because 22078819 - 2¹¹ = 22076771 is a prime.

It is a super-2 number, since 2×22078819² = 974948496869522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22078813) 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, 7272 + ... + 9850.

It is an arithmetic number, because the mean of its divisors is an integer number (3157920).

Almost surely, 2^22078819 is an apocalyptic number.

22078819 is a deficient number, since it is larger than the sum of its proper divisors (3184541).

22078819 is a wasteful number, since it uses less digits than its factorization.

22078819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3809.

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 22078819 is about 4698.8103813625. The cubic root of 22078819 is about 280.5381614169.

It can be divided in two parts, 2207 and 8819, that added together give a triangular number (11026 = T₁₄₈).

The spelling of 22078819 in words is "twenty-two million, seventy-eight thousand, eight hundred nineteen".