78436673 has 8 divisors (see below), whose sum is σ = 89701248. Its totient is φ = 67186944.

The previous prime is 78436669. The next prime is 78436681. The reversal of 78436673 is 37663487.

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

It is a cyclic number.

It is not a de Polignac number, because 78436673 - 2² = 78436669 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78436613) 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, 12140 + ... + 17442.

It is an arithmetic number, because the mean of its divisors is an integer number (11212656).

Almost surely, 2^78436673 is an apocalyptic number.

It is an amenable number.

78436673 is a deficient number, since it is larger than the sum of its proper divisors (11264575).

78436673 is a wasteful number, since it uses less digits than its factorization.

78436673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7423.

The product of its digits is 508032, while the sum is 44.

The square root of 78436673 is about 8856.4481029361. The cubic root of 78436673 is about 428.0617159235.

The spelling of 78436673 in words is "seventy-eight million, four hundred thirty-six thousand, six hundred seventy-three".