281228440264 has 32 divisors (see below), whose sum is σ = 555097608000. Its totient is φ = 133203517632.

The previous prime is 281228440223. The next prime is 281228440289. The reversal of 281228440264 is 462044822182.

It is a super-2 number, since 2×281228440264² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 281228440264.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2220357 + ... + 2343595.

It is an arithmetic number, because the mean of its divisors is an integer number (17346800250).

Almost surely, 2^281228440264 is an apocalyptic number.

It is an amenable number.

281228440264 is a deficient number, since it is larger than the sum of its proper divisors (273869167736).

281228440264 is a wasteful number, since it uses less digits than its factorization.

281228440264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138277 (or 138273 counting only the distinct ones).

The product of its (nonzero) digits is 393216, while the sum is 43.

The spelling of 281228440264 in words is "two hundred eighty-one billion, two hundred twenty-eight million, four hundred forty thousand, two hundred sixty-four".