77617140 has 24 divisors (see below), whose sum is σ = 217328160. Its totient is φ = 20697888.

The previous prime is 77617139. The next prime is 77617151. The reversal of 77617140 is 4171677.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 646750 + ... + 646869.

It is an arithmetic number, because the mean of its divisors is an integer number (9055340).

Almost surely, 2^77617140 is an apocalyptic number.

It is an amenable number.

77617140 is an abundant number, since it is smaller than the sum of its proper divisors (139711020).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77617140 is a wasteful number, since it uses less digits than its factorization.

77617140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1293631 (or 1293629 counting only the distinct ones).

The product of its (nonzero) digits is 8232, while the sum is 33.

The square root of 77617140 is about 8810.0590236388. The cubic root of 77617140 is about 426.5656485565.

The spelling of 77617140 in words is "seventy-seven million, six hundred seventeen thousand, one hundred forty".