22420878 has 8 divisors (see below), whose sum is σ = 44841768. Its totient is φ = 7473624.

The previous prime is 22420861. The next prime is 22420897. The reversal of 22420878 is 87802422.

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

22420878 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1868401 + ... + 1868412.

It is an arithmetic number, because the mean of its divisors is an integer number (5605221).

Almost surely, 2^22420878 is an apocalyptic number.

22420878 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.

22420878 is a wasteful number, since it uses less digits than its factorization.

22420878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3736818.

The product of its (nonzero) digits is 14336, while the sum is 33.

The square root of 22420878 is about 4735.0689540914. The cubic root of 22420878 is about 281.9795015531.

The spelling of 22420878 in words is "twenty-two million, four hundred twenty thousand, eight hundred seventy-eight".