78028487 has 8 divisors (see below), whose sum is σ = 83223936. Its totient is φ = 72900352.

The previous prime is 78028471. The next prime is 78028493. The reversal of 78028487 is 78482087.

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 78028487 - 2⁴ = 78028471 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78028087) 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, 14423 + ... + 19080.

It is an arithmetic number, because the mean of its divisors is an integer number (10402992).

Almost surely, 2^78028487 is an apocalyptic number.

78028487 is a deficient number, since it is larger than the sum of its proper divisors (5195449).

78028487 is a wasteful number, since it uses less digits than its factorization.

78028487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33657.

The product of its (nonzero) digits is 200704, while the sum is 44.

The square root of 78028487 is about 8833.3734778962. The cubic root of 78028487 is about 427.3178768934.

The spelling of 78028487 in words is "seventy-eight million, twenty-eight thousand, four hundred eighty-seven".