22320978 has 8 divisors (see below), whose sum is σ = 44641968. Its totient is φ = 7440324.

The previous prime is 22320967. The next prime is 22321007. The reversal of 22320978 is 87902322.

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

22320978 is an admirable number.

It is a super-3 number, since 3×22320978³ (a number of 23 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1860076 + ... + 1860087.

It is an arithmetic number, because the mean of its divisors is an integer number (5580246).

Almost surely, 2^22320978 is an apocalyptic number.

22320978 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.

22320978 is a wasteful number, since it uses less digits than its factorization.

22320978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3720168.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 22320978 is about 4724.5082283768. The cubic root of 22320978 is about 281.5600755991.

The spelling of 22320978 in words is "twenty-two million, three hundred twenty thousand, nine hundred seventy-eight".