78990022 has 8 divisors (see below), whose sum is σ = 118542672. Its totient is φ = 39475800.

The previous prime is 78990013. The next prime is 78990047. The reversal of 78990022 is 22009987.

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 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, 3754 + ... + 13117.

It is an arithmetic number, because the mean of its divisors is an integer number (14817834).

Almost surely, 2^78990022 is an apocalyptic number.

78990022 is a deficient number, since it is larger than the sum of its proper divisors (39552650).

78990022 is a wasteful number, since it uses less digits than its factorization.

78990022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19214.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 78990022 is about 8887.6330932369. The cubic root of 78990022 is about 429.0659769607.

The spelling of 78990022 in words is "seventy-eight million, nine hundred ninety thousand, twenty-two".