771402340 has 24 divisors (see below), whose sum is σ = 1646503992. Its totient is φ = 303502080.

The previous prime is 771402311. The next prime is 771402343. The reversal of 771402340 is 43204177.

It can be written as a sum of positive squares in 4 ways, for example, as 451584 + 770950756 = 672^2 + 27766^2 .

It is a junction number, because it is equal to n+sod(n) for n = 771402299 and 771402308.

It is not an unprimeable number, because it can be changed into a prime (771402343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 314929 + ... + 317368.

It is an arithmetic number, because the mean of its divisors is an integer number (68604333).

Almost surely, 2^771402340 is an apocalyptic number.

It is an amenable number.

771402340 is an abundant number, since it is smaller than the sum of its proper divisors (875101652).

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

771402340 is a wasteful number, since it uses less digits than its factorization.

771402340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 632367 (or 632365 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 28.

The square root of 771402340 is about 27774.1307694768. The cubic root of 771402340 is about 917.1217307845.

The spelling of 771402340 in words is "seven hundred seventy-one million, four hundred two thousand, three hundred forty".