787816 has 32 divisors (see below), whose sum is σ = 1598400. Its totient is φ = 362880.

The previous prime is 787811. The next prime is 787817. The reversal of 787816 is 618787.

It is a happy number.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (787811) 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, 10756 + ... + 10828.

It is an arithmetic number, because the mean of its divisors is an integer number (49950).

2⁷⁸⁷⁸¹⁶ is an apocalyptic number.

787816 is a gapful number since it is divisible by the number (76) formed by its first and last digit.

It is an amenable number.

787816 is an abundant number, since it is smaller than the sum of its proper divisors (810584).

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

787816 is a wasteful number, since it uses less digits than its factorization.

787816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169 (or 165 counting only the distinct ones).

The product of its digits is 18816, while the sum is 37.

The square root of 787816 is about 887.5899954371. The cubic root of 787816 is about 92.3580877238.

It can be divided in two parts, 78781 and 6, that added together give a palindrome (78787).

The spelling of 787816 in words is "seven hundred eighty-seven thousand, eight hundred sixteen".