276623680 has 28 divisors (see below), whose sum is σ = 658710900. Its totient is φ = 110649344.

The previous prime is 276623671. The next prime is 276623689. The reversal of 276623680 is 86326672.

It is an interprime number because it is at equal distance from previous prime (276623671) and next prime (276623689).

It can be written as a sum of positive squares in 2 ways, for example, as 99840064 + 176783616 = 9992^2 + 13296^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (276623689) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 431905 + ... + 432544.

Almost surely, 2^276623680 is an apocalyptic number.

276623680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

276623680 is an abundant number, since it is smaller than the sum of its proper divisors (382087220).

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

276623680 is an equidigital number, since it uses as much as digits as its factorization.

276623680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 864466 (or 864456 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 40.

The square root of 276623680 is about 16632.0076960059. The cubic root of 276623680 is about 651.5730578391.

The spelling of 276623680 in words is "two hundred seventy-six million, six hundred twenty-three thousand, six hundred eighty".