78268942 has 8 divisors (see below), whose sum is σ = 123582600. Its totient is φ = 37074744.

The previous prime is 78268933. The next prime is 78268943. The reversal of 78268942 is 24986287.

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

It is a super-2 number, since 2×78268942² = 12252054563598728, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78268892 and 78268901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78268943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1029817 + ... + 1029892.

It is an arithmetic number, because the mean of its divisors is an integer number (15447825).

Almost surely, 2^78268942 is an apocalyptic number.

78268942 is a deficient number, since it is larger than the sum of its proper divisors (45313658).

78268942 is a wasteful number, since it uses less digits than its factorization.

78268942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2059730.

The product of its digits is 387072, while the sum is 46.

The square root of 78268942 is about 8846.9736068330. The cubic root of 78268942 is about 427.7563721053.

The spelling of 78268942 in words is "seventy-eight million, two hundred sixty-eight thousand, nine hundred forty-two".