276265640 has 128 divisors (see below), whose sum is σ = 759767040. Its totient is φ = 88252416.

The previous prime is 276265637. The next prime is 276265651. The reversal of 276265640 is 46562672.

It is a junction number, because it is equal to n+sod(n) for n = 276265594 and 276265603.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 604292 + ... + 604748.

It is an arithmetic number, because the mean of its divisors is an integer number (5935680).

Almost surely, 2^276265640 is an apocalyptic number.

276265640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 276265640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (379883520).

276265640 is an abundant number, since it is smaller than the sum of its proper divisors (483501400).

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

276265640 is a wasteful number, since it uses less digits than its factorization.

276265640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 619 (or 615 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 38.

The square root of 276265640 is about 16621.2406275825. The cubic root of 276265640 is about 651.2918214430.

The spelling of 276265640 in words is "two hundred seventy-six million, two hundred sixty-five thousand, six hundred forty".