9220191878 has 8 divisors (see below), whose sum is σ = 13964562768. Its totient is φ = 4565337624.

The previous prime is 9220191839. The next prime is 9220191899. The reversal of 9220191878 is 8781910229.

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

It is a congruent number.

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, 22378901 + ... + 22379312.

It is an arithmetic number, because the mean of its divisors is an integer number (1745570346).

Almost surely, 2^9220191878 is an apocalyptic number.

9220191878 is a deficient number, since it is larger than the sum of its proper divisors (4744370890).

9220191878 is a wasteful number, since it uses less digits than its factorization.

9220191878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44758318.

The product of its (nonzero) digits is 145152, while the sum is 47.

The square root of 9220191878 is about 96021.8302158421. The cubic root of 9220191878 is about 2096.9109441573.

The spelling of 9220191878 in words is "nine billion, two hundred twenty million, one hundred ninety-one thousand, eight hundred seventy-eight".