276401220 has 48 divisors (see below), whose sum is σ = 775783680. Its totient is φ = 73529856.

The previous prime is 276401207. The next prime is 276401231. The reversal of 276401220 is 22104672.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20661 + ... + 31299.

It is an arithmetic number, because the mean of its divisors is an integer number (16162160).

Almost surely, 2^276401220 is an apocalyptic number.

276401220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

276401220 is an abundant number, since it is smaller than the sum of its proper divisors (499382460).

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

276401220 is a wasteful number, since it uses less digits than its factorization.

276401220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11084 (or 11082 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 276401220 is about 16625.3186435629. The cubic root of 276401220 is about 651.3983465784.

Adding to 276401220 its reverse (22104672), we get a palindrome (298505892).

The spelling of 276401220 in words is "two hundred seventy-six million, four hundred one thousand, two hundred twenty".