771878872 has 16 divisors (see below), whose sum is σ = 1470999600. Its totient is φ = 379612320.

The previous prime is 771878837. The next prime is 771878879. The reversal of 771878872 is 278878177.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (771878879) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 790372 + ... + 791347.

It is an arithmetic number, because the mean of its divisors is an integer number (91937475).

Almost surely, 2^771878872 is an apocalyptic number.

It is an amenable number.

771878872 is a deficient number, since it is larger than the sum of its proper divisors (699120728).

771878872 is a wasteful number, since it uses less digits than its factorization.

771878872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1581786 (or 1581782 counting only the distinct ones).

The product of its digits is 2458624, while the sum is 55.

The square root of 771878872 is about 27782.7081473351. The cubic root of 771878872 is about 917.3105418487.

The spelling of 771878872 in words is "seven hundred seventy-one million, eight hundred seventy-eight thousand, eight hundred seventy-two".