78981406 has 8 divisors (see below), whose sum is σ = 135396720. Its totient is φ = 33849168.

The previous prime is 78981391. The next prime is 78981407. The reversal of 78981406 is 60418987.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78981407) by changing a digit.

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, 2820751 + ... + 2820778.

It is an arithmetic number, because the mean of its divisors is an integer number (16924590).

Almost surely, 2^78981406 is an apocalyptic number.

78981406 is a deficient number, since it is larger than the sum of its proper divisors (56415314).

78981406 is a wasteful number, since it uses less digits than its factorization.

78981406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5641538.

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 78981406 is about 8887.1483615387. The cubic root of 78981406 is about 429.0503759738.

The spelling of 78981406 in words is "seventy-eight million, nine hundred eighty-one thousand, four hundred six".