276623640 has 64 divisors (see below), whose sum is σ = 922082400. Its totient is φ = 73766016.

The previous prime is 276623639. The next prime is 276623671. The reversal of 276623640 is 46326672.

It is a happy number.

276623640 is a `hidden beast` number, since 2 + 7 + 6 + 6 + 2 + 3 + 640 = 666.

276623640 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 276623595 and 276623604.

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 15 ways as a sum of consecutive naturals, for example, 126987 + ... + 129146.

Almost surely, 2^276623640 is an apocalyptic number.

276623640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

276623640 is an abundant number, since it is smaller than the sum of its proper divisors (645458760).

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

276623640 is a wasteful number, since it uses less digits than its factorization.

276623640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256153 (or 256143 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 36.

The square root of 276623640 is about 16632.0064935052. The cubic root of 276623640 is about 651.5730264331.

The spelling of 276623640 in words is "two hundred seventy-six million, six hundred twenty-three thousand, six hundred forty".