78088587 has 4 divisors (see below), whose sum is σ = 104118120. Its totient is φ = 52059056.

The previous prime is 78088553. The next prime is 78088627. The reversal of 78088587 is 78588087.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78588087 = 3 ⋅26196029.

It is a cyclic number.

It is not a de Polignac number, because 78088587 - 2⁷ = 78088459 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78088547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13014762 + ... + 13014767.

It is an arithmetic number, because the mean of its divisors is an integer number (26029530).

Almost surely, 2^78088587 is an apocalyptic number.

78088587 is a deficient number, since it is larger than the sum of its proper divisors (26029533).

78088587 is a wasteful number, since it uses less digits than its factorization.

78088587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26029532.

The product of its (nonzero) digits is 1003520, while the sum is 51.

The square root of 78088587 is about 8836.7746944233. The cubic root of 78088587 is about 427.4275599702.

Subtracting 78088587 from its reverse (78588087), we obtain a triangular number (499500 = T₉₉₉).

The spelling of 78088587 in words is "seventy-eight million, eighty-eight thousand, five hundred eighty-seven".