78986942 has 8 divisors (see below), whose sum is σ = 118525032. Its totient is φ = 39478600.

The previous prime is 78986917. The next prime is 78986969. The reversal of 78986942 is 24968987.

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

It is a super-2 number, since 2×78986942² = 12477874013022728, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1217 + ... + 12627.

It is an arithmetic number, because the mean of its divisors is an integer number (14815629).

Almost surely, 2^78986942 is an apocalyptic number.

78986942 is a deficient number, since it is larger than the sum of its proper divisors (39538090).

78986942 is a wasteful number, since it uses less digits than its factorization.

78986942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14874.

The product of its digits is 1741824, while the sum is 53.

The square root of 78986942 is about 8887.4598170681. The cubic root of 78986942 is about 429.0604001365.

The spelling of 78986942 in words is "seventy-eight million, nine hundred eighty-six thousand, nine hundred forty-two".