276638380 has 12 divisors (see below), whose sum is σ = 580940640. Its totient is φ = 110655344.

The previous prime is 276638371. The next prime is 276638441. The reversal of 276638380 is 83836672.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6915940 + ... + 6915979.

It is an arithmetic number, because the mean of its divisors is an integer number (48411720).

Almost surely, 2^276638380 is an apocalyptic number.

276638380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

276638380 is an abundant number, since it is smaller than the sum of its proper divisors (304302260).

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

276638380 is a wasteful number, since it uses less digits than its factorization.

276638380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13831928 (or 13831926 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 43.

The square root of 276638380 is about 16632.4496091225. The cubic root of 276638380 is about 651.5845993363.

The spelling of 276638380 in words is "two hundred seventy-six million, six hundred thirty-eight thousand, three hundred eighty".