771864 has 32 divisors (see below), whose sum is σ = 1998000. Its totient is φ = 248192.

The previous prime is 771863. The next prime is 771877. The reversal of 771864 is 468177.

771864 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (771863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142 + ... + 1250.

2⁷⁷¹⁸⁶⁴ 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 771864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (999000).

771864 is an abundant number, since it is smaller than the sum of its proper divisors (1226136).

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

771864 is a wasteful number, since it uses less digits than its factorization.

771864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1147 (or 1143 counting only the distinct ones).

The product of its digits is 9408, while the sum is 33.

The square root of 771864 is about 878.5579093036. The cubic root of 771864 is about 91.7304650454.

The spelling of 771864 in words is "seven hundred seventy-one thousand, eight hundred sixty-four".