22078945 has 8 divisors (see below), whose sum is σ = 30279744. Its totient is φ = 15139824.

The previous prime is 22078943. The next prime is 22078967. The reversal of 22078945 is 54987022.

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

It is not a de Polignac number, because 22078945 - 2¹ = 22078943 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22078943) 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, 315379 + ... + 315448.

It is an arithmetic number, because the mean of its divisors is an integer number (3784968).

Almost surely, 2^22078945 is an apocalyptic number.

It is an amenable number.

22078945 is a deficient number, since it is larger than the sum of its proper divisors (8200799).

22078945 is an equidigital number, since it uses as much as digits as its factorization.

22078945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 630839.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 22078945 is about 4698.8237889923. The cubic root of 22078945 is about 280.5386950768.

The spelling of 22078945 in words is "twenty-two million, seventy-eight thousand, nine hundred forty-five".