78000087 has 8 divisors (see below), whose sum is σ = 113454720. Its totient is φ = 47272760.

The previous prime is 78000071. The next prime is 78000089.

It is a happy number.

78000087 is nontrivially palindromic in base 10.

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

It is a cyclic number.

It is not a de Polignac number, because 78000087 - 2⁴ = 78000071 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78000089) 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, 1181787 + ... + 1181852.

It is an arithmetic number, because the mean of its divisors is an integer number (14181840).

Almost surely, 2^78000087 is an apocalyptic number.

78000087 is a deficient number, since it is larger than the sum of its proper divisors (35454633).

78000087 is a wasteful number, since it uses less digits than its factorization.

78000087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2363653.

The product of its (nonzero) digits is 3136, while the sum is 30.

The square root of 78000087 is about 8831.7657917316. The cubic root of 78000087 is about 427.2660270250.

It can be divided in two parts, 780000 and 87, that added together give a palindrome (780087).

The spelling of 78000087 in words is "seventy-eight million, eighty-seven", and thus it is an aban number and an uban number.