878258987 has 4 divisors (see below), whose sum is σ = 878779440. Its totient is φ = 877738536.

The previous prime is 878258959. The next prime is 878258989. The reversal of 878258987 is 789852878.

It is a happy number.

878258987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 878258987 - 2¹⁸ = 877996843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (878258989) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 257687 + ... + 261072.

It is an arithmetic number, because the mean of its divisors is an integer number (219694860).

Almost surely, 2^878258987 is an apocalyptic number.

878258987 is a deficient number, since it is larger than the sum of its proper divisors (520453).

878258987 is a wasteful number, since it uses less digits than its factorization.

878258987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 520452.

The product of its digits is 18063360, while the sum is 62.

The square root of 878258987 is about 29635.4346517813. The cubic root of 878258987 is about 957.6515902306.

The spelling of 878258987 in words is "eight hundred seventy-eight million, two hundred fifty-eight thousand, nine hundred eighty-seven".