771028992 has 144 divisors (see below), whose sum is σ = 2267811000. Its totient is φ = 252297216.

The previous prime is 771028981. The next prime is 771029009. The reversal of 771028992 is 299820177.

It is a tau number, because it is divible by the number of its divisors (144).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1087134 + ... + 1087842.

Almost surely, 2^771028992 is an apocalyptic number.

771028992 is a gapful number since it is divisible by the number (72) 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 771028992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1133905500).

771028992 is an abundant number, since it is smaller than the sum of its proper divisors (1496782008).

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

771028992 is a wasteful number, since it uses less digits than its factorization.

771028992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 796 (or 773 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 45.

The square root of 771028992 is about 27767.4088096099. The cubic root of 771028992 is about 916.9737488556.

The spelling of 771028992 in words is "seven hundred seventy-one million, twenty-eight thousand, nine hundred ninety-two".