78334978 has 8 divisors (see below), whose sum is σ = 118990080. Its totient is φ = 38671620.

The previous prime is 78334973. The next prime is 78334981. The reversal of 78334978 is 87943387.

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

It is a super-2 number, since 2×78334978² = 12272737556520968, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78334973) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 247738 + ... + 248053.

It is an arithmetic number, because the mean of its divisors is an integer number (14873760).

Almost surely, 2^78334978 is an apocalyptic number.

78334978 is a deficient number, since it is larger than the sum of its proper divisors (40655102).

78334978 is a wasteful number, since it uses less digits than its factorization.

78334978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495872.

The product of its digits is 1016064, while the sum is 49.

The square root of 78334978 is about 8850.7049436754. The cubic root of 78334978 is about 427.8766385381.

The spelling of 78334978 in words is "seventy-eight million, three hundred thirty-four thousand, nine hundred seventy-eight".