78328723 has 8 divisors (see below), whose sum is σ = 88206336. Its totient is φ = 68910600.

The previous prime is 78328721. The next prime is 78328727. The reversal of 78328723 is 32782387.

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

It is not a de Polignac number, because 78328723 - 2¹ = 78328721 is a prime.

It is a super-2 number, since 2×78328723² = 12270777693621458, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78328721) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 114511 + ... + 115192.

It is an arithmetic number, because the mean of its divisors is an integer number (11025792).

Almost surely, 2^78328723 is an apocalyptic number.

78328723 is a deficient number, since it is larger than the sum of its proper divisors (9877613).

78328723 is a wasteful number, since it uses less digits than its factorization.

78328723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229745.

The product of its digits is 112896, while the sum is 40.

The square root of 78328723 is about 8850.3515749376. The cubic root of 78328723 is about 427.8652496725.

The spelling of 78328723 in words is "seventy-eight million, three hundred twenty-eight thousand, seven hundred twenty-three".