77317740 has 84 divisors (see below), whose sum is σ = 243485424. Its totient is φ = 20614176.

The previous prime is 77317729. The next prime is 77317763. The reversal of 77317740 is 4771377.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 77317695 and 77317704.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 11929 + ... + 17231.

It is an arithmetic number, because the mean of its divisors is an integer number (2898636).

Almost surely, 2^77317740 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77317740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121742712).

77317740 is an abundant number, since it is smaller than the sum of its proper divisors (166167684).

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

77317740 is a wasteful number, since it uses less digits than its factorization.

77317740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5330 (or 5313 counting only the distinct ones).

The product of its (nonzero) digits is 28812, while the sum is 36.

The square root of 77317740 is about 8793.0506651560. The cubic root of 77317740 is about 426.0164643508.

The spelling of 77317740 in words is "seventy-seven million, three hundred seventeen thousand, seven hundred forty".