76808409 has 8 divisors (see below), whose sum is σ = 102697920. Its totient is φ = 51062256.

The previous prime is 76808399. The next prime is 76808429. The reversal of 76808409 is 90480867.

It is a happy number.

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

It is not a de Polignac number, because 76808409 - 2⁹ = 76807897 is a prime.

It is a super-2 number, since 2×76808409² = 11799063386222562, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (76808429) 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, 34582 + ... + 36735.

It is an arithmetic number, because the mean of its divisors is an integer number (12837240).

Almost surely, 2^76808409 is an apocalyptic number.

It is an amenable number.

76808409 is a deficient number, since it is larger than the sum of its proper divisors (25889511).

76808409 is a wasteful number, since it uses less digits than its factorization.

76808409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71679.

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 76808409 is about 8764.0406776783. The cubic root of 76808409 is about 425.0789408150.

The spelling of 76808409 in words is "seventy-six million, eight hundred eight thousand, four hundred nine".