77140808 has 8 divisors (see below), whose sum is σ = 144639030. Its totient is φ = 38570400.

The previous prime is 77140801. The next prime is 77140837. The reversal of 77140808 is 80804177.

It can be written as a sum of positive squares in only one way, i.e., 76702564 + 438244 = 8758^2 + 662^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (77140801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4821293 + ... + 4821308.

Almost surely, 2^77140808 is an apocalyptic number.

It is an amenable number.

77140808 is a deficient number, since it is larger than the sum of its proper divisors (67498222).

77140808 is a wasteful number, since it uses less digits than its factorization.

77140808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9642607 (or 9642603 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 35.

The square root of 77140808 is about 8782.9840031734. The cubic root of 77140808 is about 425.6912543174.

The spelling of 77140808 in words is "seventy-seven million, one hundred forty thousand, eight hundred eight".