768621 has 16 divisors (see below), whose sum is σ = 1240704. Its totient is φ = 413184.

The previous prime is 768613. The next prime is 768623. The reversal of 768621 is 126867.

It is a happy number.

It is not a de Polignac number, because 768621 - 2³ = 768613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (768623) 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 15 ways as a sum of consecutive naturals, for example, 720 + ... + 1433.

It is an arithmetic number, because the mean of its divisors is an integer number (77544).

2⁷⁶⁸⁶²¹ is an apocalyptic number.

It is an amenable number.

768621 is a deficient number, since it is larger than the sum of its proper divisors (472083).

768621 is a wasteful number, since it uses less digits than its factorization.

768621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2180.

The product of its digits is 4032, while the sum is 30.

The square root of 768621 is about 876.7103284438. The cubic root of 768621 is about 91.6018156553.

The spelling of 768621 in words is "seven hundred sixty-eight thousand, six hundred twenty-one".