76488309 has 6 divisors (see below), whose sum is σ = 110483126. Its totient is φ = 50992200.

The previous prime is 76488299. The next prime is 76488323. The reversal of 76488309 is 90388467.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 47651409 + 28836900 = 6903^2 + 5370^2 .

It is a de Polignac number, because none of the positive numbers 2^k-76488309 is a prime.

It is a super-2 number, since 2×76488309² = 11700922827358962, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76480309) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4249342 + ... + 4249359.

Almost surely, 2^76488309 is an apocalyptic number.

It is an amenable number.

76488309 is a deficient number, since it is larger than the sum of its proper divisors (33994817).

76488309 is a wasteful number, since it uses less digits than its factorization.

76488309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8498707 (or 8498704 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 76488309 is about 8745.7594867456. The cubic root of 76488309 is about 424.4876113371.

The spelling of 76488309 in words is "seventy-six million, four hundred eighty-eight thousand, three hundred nine".