775886972 has 72 divisors (see below), whose sum is σ = 1639870848. Its totient is φ = 319939200.

The previous prime is 775886957. The next prime is 775886989. The reversal of 775886972 is 279688577.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 1682822 + ... + 1683282.

It is an arithmetic number, because the mean of its divisors is an integer number (22775984).

Almost surely, 2^775886972 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 775886972, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (819935424).

775886972 is an abundant number, since it is smaller than the sum of its proper divisors (863983876).

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

775886972 is a wasteful number, since it uses less digits than its factorization.

775886972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 787 (or 778 counting only the distinct ones).

The product of its digits is 11854080, while the sum is 59.

The square root of 775886972 is about 27854.7477461204. The cubic root of 775886972 is about 918.8955603084.

The spelling of 775886972 in words is "seven hundred seventy-five million, eight hundred eighty-six thousand, nine hundred seventy-two".