77171140 has 24 divisors (see below), whose sum is σ = 162836352. Its totient is φ = 30720480.

The previous prime is 77171137. The next prime is 77171153. The reversal of 77171140 is 4117177.

It is a junction number, because it is equal to n+sod(n) for n = 77171099 and 77171108.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4924 + ... + 13363.

It is an arithmetic number, because the mean of its divisors is an integer number (6784848).

Almost surely, 2^77171140 is an apocalyptic number.

It is an amenable number.

77171140 is an abundant number, since it is smaller than the sum of its proper divisors (85665212).

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

77171140 is a wasteful number, since it uses less digits than its factorization.

77171140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18507 (or 18505 counting only the distinct ones).

The product of its (nonzero) digits is 1372, while the sum is 28.

The square root of 77171140 is about 8784.7105814591. The cubic root of 77171140 is about 425.7470413708.

The spelling of 77171140 in words is "seventy-seven million, one hundred seventy-one thousand, one hundred forty".