78112942 has 16 divisors (see below), whose sum is σ = 118595664. Its totient is φ = 38584000.

The previous prime is 78112939. The next prime is 78112949. The reversal of 78112942 is 24921187.

It is a super-2 number, since 2×78112942² = 12203263415790728, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78112898 and 78112907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78112949) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73092 + ... + 74152.

It is an arithmetic number, because the mean of its divisors is an integer number (7412229).

Almost surely, 2^78112942 is an apocalyptic number.

78112942 is a deficient number, since it is larger than the sum of its proper divisors (40482722).

78112942 is a wasteful number, since it uses less digits than its factorization.

78112942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1475.

The product of its digits is 8064, while the sum is 34.

The square root of 78112942 is about 8838.1526350250. The cubic root of 78112942 is about 427.4719920549.

The spelling of 78112942 in words is "seventy-eight million, one hundred twelve thousand, nine hundred forty-two".