771622852 has 96 divisors (see below), whose sum is σ = 1831624704. Its totient is φ = 274665600.

The previous prime is 771622849. The next prime is 771622861. The reversal of 771622852 is 258226177.

It is a happy number.

It is a super-2 number, since 2×771622852² = 1190803651457227808, which contains 22 as substring.

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, 411477 + ... + 413347.

It is an arithmetic number, because the mean of its divisors is an integer number (19079424).

Almost surely, 2^771622852 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 771622852, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (915812352).

771622852 is an abundant number, since it is smaller than the sum of its proper divisors (1060001852).

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

771622852 is a wasteful number, since it uses less digits than its factorization.

771622852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2009 (or 2007 counting only the distinct ones).

The product of its digits is 94080, while the sum is 40.

The square root of 771622852 is about 27778.1002230174. The cubic root of 771622852 is about 917.2091115063.

The spelling of 771622852 in words is "seven hundred seventy-one million, six hundred twenty-two thousand, eight hundred fifty-two".