281888400284 has 12 divisors (see below), whose sum is σ = 493318351344. Its totient is φ = 140940299904.

The previous prime is 281888400271. The next prime is 281888400341. The reversal of 281888400284 is 482004888182.

It is a super-2 number, since 2×281888400284² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 809312 + ... + 1103975.

It is an arithmetic number, because the mean of its divisors is an integer number (41109862612).

Almost surely, 2^281888400284 is an apocalyptic number.

It is an amenable number.

281888400284 is a deficient number, since it is larger than the sum of its proper divisors (211429951060).

281888400284 is a wasteful number, since it uses less digits than its factorization.

281888400284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1950124 (or 1950122 counting only the distinct ones).

The product of its (nonzero) digits is 2097152, while the sum is 53.

The spelling of 281888400284 in words is "two hundred eighty-one billion, eight hundred eighty-eight million, four hundred thousand, two hundred eighty-four".