771972086 has 16 divisors (see below), whose sum is σ = 1187343360. Its totient is φ = 376257000.

The previous prime is 771972041. The next prime is 771972101. The reversal of 771972086 is 680279177.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a self number, because there is not a number n which added to its sum of digits gives 771972086.

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 7 ways as a sum of consecutive naturals, for example, 7235 + ... + 39953.

It is an arithmetic number, because the mean of its divisors is an integer number (74208960).

Almost surely, 2^771972086 is an apocalyptic number.

771972086 is a deficient number, since it is larger than the sum of its proper divisors (415371274).

771972086 is a wasteful number, since it uses less digits than its factorization.

771972086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33019.

The product of its (nonzero) digits is 296352, while the sum is 47.

The square root of 771972086 is about 27784.3856509371. The cubic root of 771972086 is about 917.3474659251.

The spelling of 771972086 in words is "seven hundred seventy-one million, nine hundred seventy-two thousand, eighty-six".