276890656 has 96 divisors (see below), whose sum is σ = 644692608. Its totient is φ = 114616320.

The previous prime is 276890617. The next prime is 276890681. The reversal of 276890656 is 656098672.

It is a happy number.

It is a super-2 number, since 2×276890656² = 153336870760220672, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 985236 + ... + 985516.

It is an arithmetic number, because the mean of its divisors is an integer number (6715548).

Almost surely, 2^276890656 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 276890656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (322346304).

276890656 is an abundant number, since it is smaller than the sum of its proper divisors (367801952).

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

276890656 is a wasteful number, since it uses less digits than its factorization.

276890656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434 (or 426 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 49.

The square root of 276890656 is about 16640.0317307390. The cubic root of 276890656 is about 651.7826065856.

The spelling of 276890656 in words is "two hundred seventy-six million, eight hundred ninety thousand, six hundred fifty-six".