78343670 has 8 divisors (see below), whose sum is σ = 141018624. Its totient is φ = 31337464.

The previous prime is 78343663. The next prime is 78343679. The reversal of 78343670 is 7634387.

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

It is a super-2 number, since 2×78343670² = 12275461258137800, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78343679) by changing a digit.

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, 3917174 + ... + 3917193.

It is an arithmetic number, because the mean of its divisors is an integer number (17627328).

Almost surely, 2^78343670 is an apocalyptic number.

78343670 is a deficient number, since it is larger than the sum of its proper divisors (62674954).

78343670 is a wasteful number, since it uses less digits than its factorization.

78343670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7834374.

The product of its (nonzero) digits is 84672, while the sum is 38.

The square root of 78343670 is about 8851.1959643881. The cubic root of 78343670 is about 427.8924635939.

The spelling of 78343670 in words is "seventy-eight million, three hundred forty-three thousand, six hundred seventy".