76828813 has 8 divisors (see below), whose sum is σ = 77873400. Its totient is φ = 75790848.

The previous prime is 76828811. The next prime is 76828823. The reversal of 76828813 is 31882867.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 56169 + 76772644 = 237^2 + 8762^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 76828813 - 2¹ = 76828811 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 76828813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76828811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24393 + ... + 27361.

It is an arithmetic number, because the mean of its divisors is an integer number (9734175).

Almost surely, 2^76828813 is an apocalyptic number.

It is an amenable number.

76828813 is a deficient number, since it is larger than the sum of its proper divisors (1044587).

76828813 is a wasteful number, since it uses less digits than its factorization.

76828813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3311.

The product of its digits is 129024, while the sum is 43.

The square root of 76828813 is about 8765.2046753056. The cubic root of 76828813 is about 425.1165779389.

The spelling of 76828813 in words is "seventy-six million, eight hundred twenty-eight thousand, eight hundred thirteen".