771023540 has 96 divisors (see below), whose sum is σ = 1905598464. Its totient is φ = 256556160.

The previous prime is 771023527. The next prime is 771023563. The reversal of 771023540 is 45320177.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 1269917 + ... + 1270523.

It is an arithmetic number, because the mean of its divisors is an integer number (19849984).

Almost surely, 2^771023540 is an apocalyptic number.

771023540 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 771023540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (952799232).

771023540 is an abundant number, since it is smaller than the sum of its proper divisors (1134574924).

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

771023540 is a wasteful number, since it uses less digits than its factorization.

771023540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 877 (or 875 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 29.

The square root of 771023540 is about 27767.3106367902. The cubic root of 771023540 is about 916.9715875219.

The spelling of 771023540 in words is "seven hundred seventy-one million, twenty-three thousand, five hundred forty".