771090216 has 192 divisors, whose sum is σ = 2262582720. Its totient is φ = 218050560.

The previous prime is 771090179. The next prime is 771090223. The reversal of 771090216 is 612090177.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3654351 + ... + 3654561.

It is an arithmetic number, because the mean of its divisors is an integer number (11784285).

Almost surely, 2^771090216 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 771090216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1131291360).

771090216 is an abundant number, since it is smaller than the sum of its proper divisors (1491492504).

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

771090216 is a wasteful number, since it uses less digits than its factorization.

771090216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316 (or 299 counting only the distinct ones).

The product of its (nonzero) digits is 5292, while the sum is 33.

The square root of 771090216 is about 27768.5112312490. The cubic root of 771090216 is about 916.9980191556.

The spelling of 771090216 in words is "seven hundred seventy-one million, ninety thousand, two hundred sixteen".