281389061900 has 36 divisors (see below), whose sum is σ = 631669935120. Its totient is φ = 108674395200.

The previous prime is 281389061873. The next prime is 281389061957. The reversal of 281389061900 is 9160983182.

It is a super-2 number, since 2×281389061900² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 48512456 + ... + 48518255.

Almost surely, 2^281389061900 is an apocalyptic number.

281389061900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

281389061900 is an abundant number, since it is smaller than the sum of its proper divisors (350280873220).

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

281389061900 is a wasteful number, since it uses less digits than its factorization.

281389061900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97030754 (or 97030747 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 47.

The spelling of 281389061900 in words is "two hundred eighty-one billion, three hundred eighty-nine million, sixty-one thousand, nine hundred".