78457623 has 8 divisors (see below), whose sum is σ = 109158528. Its totient is φ = 50030904.

The previous prime is 78457609. The next prime is 78457633. The reversal of 78457623 is 32675487.

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

It is not a de Polignac number, because 78457623 - 2⁹ = 78457111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78457633) 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, 568465 + ... + 568602.

It is an arithmetic number, because the mean of its divisors is an integer number (13644816).

Almost surely, 2^78457623 is an apocalyptic number.

78457623 is a deficient number, since it is larger than the sum of its proper divisors (30700905).

78457623 is a wasteful number, since it uses less digits than its factorization.

78457623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1137093.

The product of its digits is 282240, while the sum is 42.

The square root of 78457623 is about 8857.6307780354. The cubic root of 78457623 is about 428.0998235004.

The spelling of 78457623 in words is "seventy-eight million, four hundred fifty-seven thousand, six hundred twenty-three".