678858087 has 16 divisors (see below), whose sum is σ = 994210560. Its totient is φ = 410110272.

The previous prime is 678858077. The next prime is 678858097. The reversal of 678858087 is 780858876.

It is an interprime number because it is at equal distance from previous prime (678858077) and next prime (678858097).

It is not a de Polignac number, because 678858087 - 2⁶ = 678858023 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678858077) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 257598 + ... + 260219.

It is an arithmetic number, because the mean of its divisors is an integer number (62138160).

Almost surely, 2^678858087 is an apocalyptic number.

678858087 is a deficient number, since it is larger than the sum of its proper divisors (315352473).

678858087 is a wasteful number, since it uses less digits than its factorization.

678858087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517862.

The product of its (nonzero) digits is 6021120, while the sum is 57.

The square root of 678858087 is about 26054.9052387454. The cubic root of 678858087 is about 878.8734236440.

The spelling of 678858087 in words is "six hundred seventy-eight million, eight hundred fifty-eight thousand, eighty-seven".