771140 has 12 divisors (see below), whose sum is σ = 1619436. Its totient is φ = 308448.

The previous prime is 771109. The next prime is 771143. The reversal of 771140 is 41177.

It can be written as a sum of positive squares in 2 ways, for example, as 264196 + 506944 = 514^2 + 712^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 38557 = 771140 / (7 + 7 + 1 + 1 + 4 + 0).

It is not an unprimeable number, because it can be changed into a prime (771143) by changing a digit.

771140 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19259 + ... + 19298.

It is an arithmetic number, because the mean of its divisors is an integer number (134953).

2⁷⁷¹¹⁴⁰ is an apocalyptic number.

It is an amenable number.

771140 is an abundant number, since it is smaller than the sum of its proper divisors (848296).

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

771140 is a wasteful number, since it uses less digits than its factorization.

771140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38566 (or 38564 counting only the distinct ones).

The product of its (nonzero) digits is 196, while the sum is 20.

The square root of 771140 is about 878.1457737756. The cubic root of 771140 is about 91.7017753486.

The spelling of 771140 in words is "seven hundred seventy-one thousand, one hundred forty", and thus it is an iban number.