77857340 has 24 divisors (see below), whose sum is σ = 178364592. Its totient is φ = 28311680.

The previous prime is 77857301. The next prime is 77857397. The reversal of 77857340 is 4375877.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 176729 + ... + 177168.

It is an arithmetic number, because the mean of its divisors is an integer number (7431858).

Almost surely, 2^77857340 is an apocalyptic number.

It is an amenable number.

77857340 is an abundant number, since it is smaller than the sum of its proper divisors (100507252).

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

77857340 is a wasteful number, since it uses less digits than its factorization.

77857340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353917 (or 353915 counting only the distinct ones).

The product of its (nonzero) digits is 164640, while the sum is 41.

The square root of 77857340 is about 8823.6806379198. The cubic root of 77857340 is about 427.0052230950.

The spelling of 77857340 in words is "seventy-seven million, eight hundred fifty-seven thousand, three hundred forty".