22078506 has 8 divisors (see below), whose sum is σ = 44157024. Its totient is φ = 7359500.

The previous prime is 22078501. The next prime is 22078517. The reversal of 22078506 is 60587022.

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

22078506 is an admirable number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22078501) 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, 1839870 + ... + 1839881.

It is an arithmetic number, because the mean of its divisors is an integer number (5519628).

Almost surely, 2^22078506 is an apocalyptic number.

22078506 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.

22078506 is a wasteful number, since it uses less digits than its factorization.

22078506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3679756.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 22078506 is about 4698.7770749419. Note that the first 3 decimals coincide. The cubic root of 22078506 is about 280.5368357292.

The spelling of 22078506 in words is "twenty-two million, seventy-eight thousand, five hundred six".