787668258 has 64 divisors (see below), whose sum is σ = 1776660480. Its totient is φ = 230987328.

The previous prime is 787668241. The next prime is 787668269. The reversal of 787668258 is 852866787.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 787668198 and 787668207.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 643435 + ... + 644657.

It is an arithmetic number, because the mean of its divisors is an integer number (27760320).

Almost surely, 2^787668258 is an apocalyptic number.

787668258 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 787668258, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (888330240).

787668258 is an abundant number, since it is smaller than the sum of its proper divisors (988992222).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

787668258 is a wasteful number, since it uses less digits than its factorization.

787668258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1623.

The product of its digits is 9031680, while the sum is 57.

The square root of 787668258 is about 28065.4281634897. The cubic root of 787668258 is about 923.5231394678.

The spelling of 787668258 in words is "seven hundred eighty-seven million, six hundred sixty-eight thousand, two hundred fifty-eight".