77864706 has 64 divisors (see below), whose sum is σ = 183306240. Its totient is φ = 24449040.

The previous prime is 77864693. The next prime is 77864711. The reversal of 77864706 is 60746877.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 87741 + ... + 88623.

It is an arithmetic number, because the mean of its divisors is an integer number (2864160).

Almost surely, 2^77864706 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77864706, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91653120).

77864706 is an abundant number, since it is smaller than the sum of its proper divisors (105441534).

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

77864706 is a wasteful number, since it uses less digits than its factorization.

77864706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 988 (or 982 counting only the distinct ones).

The product of its (nonzero) digits is 395136, while the sum is 45.

The square root of 77864706 is about 8824.0980275607. The cubic root of 77864706 is about 427.0186888401.

The spelling of 77864706 in words is "seventy-seven million, eight hundred sixty-four thousand, seven hundred six".