78881982 has 8 divisors (see below), whose sum is σ = 157763976. Its totient is φ = 26293992.

The previous prime is 78881953. The next prime is 78881983. The reversal of 78881982 is 28918887.

It is a happy number.

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

78881982 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78881983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6573493 + ... + 6573504.

It is an arithmetic number, because the mean of its divisors is an integer number (19720497).

Almost surely, 2^78881982 is an apocalyptic number.

78881982 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.

78881982 is a wasteful number, since it uses less digits than its factorization.

78881982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13147002.

The product of its digits is 516096, while the sum is 51.

The square root of 78881982 is about 8881.5529047571. The cubic root of 78881982 is about 428.8702668447.

It can be divided in two parts, 7888 and 1982, that added together give a triangular number (9870 = T₁₄₀).

The spelling of 78881982 in words is "seventy-eight million, eight hundred eighty-one thousand, nine hundred eighty-two".