78452215 has 8 divisors (see below), whose sum is σ = 94465728. Its totient is φ = 62546400.

The previous prime is 78452177. The next prime is 78452233. The reversal of 78452215 is 51225487.

It is a happy number.

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

It is not a de Polignac number, because 78452215 - 2¹¹ = 78450167 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25311 + ... + 28240.

It is an arithmetic number, because the mean of its divisors is an integer number (11808216).

Almost surely, 2^78452215 is an apocalyptic number.

78452215 is a deficient number, since it is larger than the sum of its proper divisors (16013513).

78452215 is a wasteful number, since it uses less digits than its factorization.

78452215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53849.

The product of its digits is 22400, while the sum is 34.

The square root of 78452215 is about 8857.3254992690. The cubic root of 78452215 is about 428.0899871201.

The spelling of 78452215 in words is "seventy-eight million, four hundred fifty-two thousand, two hundred fifteen".