276640992 has 144 divisors (see below), whose sum is σ = 812343168. Its totient is φ = 89268480.

The previous prime is 276640967. The next prime is 276641009. The reversal of 276640992 is 299046672.

276640992 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1697103 + ... + 1697265.

It is an arithmetic number, because the mean of its divisors is an integer number (5641272).

Almost surely, 2^276640992 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 276640992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (406171584).

276640992 is an abundant number, since it is smaller than the sum of its proper divisors (535702176).

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

276640992 is a wasteful number, since it uses less digits than its factorization.

276640992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333 (or 322 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The square root of 276640992 is about 16632.5281301431. The cubic root of 276640992 is about 651.5866500684.

The spelling of 276640992 in words is "two hundred seventy-six million, six hundred forty thousand, nine hundred ninety-two".