782131716 has 36 divisors (see below), whose sum is σ = 2093354172. Its totient is φ = 245374464.

The previous prime is 782131681. The next prime is 782131717. The reversal of 782131716 is 617131287.

It can be written as a sum of positive squares in 2 ways, for example, as 589032900 + 193098816 = 24270^2 + 13896^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×782131716² = 1223460042346209312, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (782131717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 638385 + ... + 639608.

It is an arithmetic number, because the mean of its divisors is an integer number (58148727).

Almost surely, 2^782131716 is an apocalyptic number.

It is an amenable number.

782131716 is an abundant number, since it is smaller than the sum of its proper divisors (1311222456).

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

782131716 is a wasteful number, since it uses less digits than its factorization.

782131716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1278020 (or 1278015 counting only the distinct ones).

The product of its digits is 14112, while the sum is 36.

The square root of 782131716 is about 27966.6178863301. The cubic root of 782131716 is about 921.3542264774.

The spelling of 782131716 in words is "seven hundred eighty-two million, one hundred thirty-one thousand, seven hundred sixteen".