78982138 has 16 divisors (see below), whose sum is σ = 127889280. Its totient is φ = 36470896.

The previous prime is 78982121. The next prime is 78982159. The reversal of 78982138 is 83128987.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28270 + ... + 30937.

It is an arithmetic number, because the mean of its divisors is an integer number (7993080).

Almost surely, 2^78982138 is an apocalyptic number.

78982138 is a deficient number, since it is larger than the sum of its proper divisors (48907142).

78982138 is a wasteful number, since it uses less digits than its factorization.

78982138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59261.

The product of its digits is 193536, while the sum is 46.

The square root of 78982138 is about 8887.1895445073. The cubic root of 78982138 is about 429.0517014500.

The spelling of 78982138 in words is "seventy-eight million, nine hundred eighty-two thousand, one hundred thirty-eight".