78993822 has 16 divisors (see below), whose sum is σ = 164856960. Its totient is φ = 25186392.

The previous prime is 78993809. The next prime is 78993823. The reversal of 78993822 is 22839987.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78993823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 286072 + ... + 286347.

It is an arithmetic number, because the mean of its divisors is an integer number (10303560).

Almost surely, 2^78993822 is an apocalyptic number.

78993822 is an abundant number, since it is smaller than the sum of its proper divisors (85863138).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78993822 is a wasteful number, since it uses less digits than its factorization.

78993822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572447.

The product of its digits is 435456, while the sum is 48.

The square root of 78993822 is about 8887.8468708681. The cubic root of 78993822 is about 429.0728572582.

The spelling of 78993822 in words is "seventy-eight million, nine hundred ninety-three thousand, eight hundred twenty-two".