771578868 has 48 divisors (see below), whose sum is σ = 1835374464. Its totient is φ = 252228480.

The previous prime is 771578867. The next prime is 771578869. The reversal of 771578868 is 868875177.

It is an interprime number because it is at equal distance from previous prime (771578867) and next prime (771578869).

It is a super-2 number, since 2×771578868² = 1190667899088322848, which contains 22 as substring.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (771578867) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 165546 + ... + 170142.

It is an arithmetic number, because the mean of its divisors is an integer number (38236968).

Almost surely, 2^771578868 is an apocalyptic number.

It is an amenable number.

771578868 is an abundant number, since it is smaller than the sum of its proper divisors (1063795596).

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

771578868 is a wasteful number, since it uses less digits than its factorization.

771578868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4872 (or 4870 counting only the distinct ones).

The product of its digits is 5268480, while the sum is 57.

The square root of 771578868 is about 27777.3085089251. The cubic root of 771578868 is about 917.1916836087.

The spelling of 771578868 in words is "seven hundred seventy-one million, five hundred seventy-eight thousand, eight hundred sixty-eight".