22978291 has 8 divisors (see below), whose sum is σ = 26289920. Its totient is φ = 19673928.

The previous prime is 22978259. The next prime is 22978313. The reversal of 22978291 is 19287922.

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 22978291 - 2⁵ = 22978259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22978231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11290 + ... + 13168.

It is an arithmetic number, because the mean of its divisors is an integer number (3286240).

Almost surely, 2^22978291 is an apocalyptic number.

22978291 is a deficient number, since it is larger than the sum of its proper divisors (3311629).

22978291 is a wasteful number, since it uses less digits than its factorization.

22978291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3633.

The product of its digits is 36288, while the sum is 40.

The square root of 22978291 is about 4793.5676692835. The cubic root of 22978291 is about 284.2971951699.

The spelling of 22978291 in words is "twenty-two million, nine hundred seventy-eight thousand, two hundred ninety-one".