776531890 has 8 divisors (see below), whose sum is σ = 1397757420. Its totient is φ = 310612752.

The previous prime is 776531867. The next prime is 776531897. The reversal of 776531890 is 98135677.

It can be written as a sum of positive squares in 2 ways, for example, as 742508001 + 34023889 = 27249^2 + 5833^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-4 number, since 4×776531890⁴ (a number of 37 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 776531890.

It is not an unprimeable number, because it can be changed into a prime (776531897) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 38826585 + ... + 38826604.

Almost surely, 2^776531890 is an apocalyptic number.

776531890 is a deficient number, since it is larger than the sum of its proper divisors (621225530).

776531890 is a wasteful number, since it uses less digits than its factorization.

776531890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77653196.

The product of its (nonzero) digits is 317520, while the sum is 46.

The square root of 776531890 is about 27866.3217881370. The cubic root of 776531890 is about 919.1500854264.

The spelling of 776531890 in words is "seven hundred seventy-six million, five hundred thirty-one thousand, eight hundred ninety".