78109982 has 8 divisors (see below), whose sum is σ = 119151000. Its totient is φ = 38392984.

The previous prime is 78109943. The next prime is 78110009. The reversal of 78109982 is 28990187.

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

It is a super-2 number, since 2×78109982² = 12202338576080648, which contains 22 as substring.

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, 330857 + ... + 331092.

It is an arithmetic number, because the mean of its divisors is an integer number (14893875).

Almost surely, 2^78109982 is an apocalyptic number.

78109982 is a deficient number, since it is larger than the sum of its proper divisors (41041018).

78109982 is a wasteful number, since it uses less digits than its factorization.

78109982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 662010.

The product of its (nonzero) digits is 72576, while the sum is 44.

The square root of 78109982 is about 8837.9851776296. The cubic root of 78109982 is about 427.4665924671.

The spelling of 78109982 in words is "seventy-eight million, one hundred nine thousand, nine hundred eighty-two".