787668 has 24 divisors (see below), whose sum is σ = 2100672. Its totient is φ = 225024.

The previous prime is 787667. The next prime is 787697. The reversal of 787668 is 866787.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (787667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4605 + ... + 4772.

It is an arithmetic number, because the mean of its divisors is an integer number (87528).

2⁷⁸⁷⁶⁶⁸ is an apocalyptic number.

It is an amenable number.

787668 is an abundant number, since it is smaller than the sum of its proper divisors (1313004).

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

787668 is a wasteful number, since it uses less digits than its factorization.

787668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9391 (or 9389 counting only the distinct ones).

The product of its digits is 112896, while the sum is 42.

The square root of 787668 is about 887.5066196936. The cubic root of 787668 is about 92.3523038635.

The spelling of 787668 in words is "seven hundred eighty-seven thousand, six hundred sixty-eight".