281949492 has 48 divisors (see below), whose sum is σ = 721715904. Its totient is φ = 84960000.

The previous prime is 281949469. The next prime is 281949511. The reversal of 281949492 is 294949182.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 17992 + ... + 29792.

It is an arithmetic number, because the mean of its divisors is an integer number (15035748).

Almost surely, 2^281949492 is an apocalyptic number.

281949492 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 281949492, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (360857952).

281949492 is an abundant number, since it is smaller than the sum of its proper divisors (439766412).

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

281949492 is a wasteful number, since it uses less digits than its factorization.

281949492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12000 (or 11998 counting only the distinct ones).

The product of its digits is 373248, while the sum is 48.

The square root of 281949492 is about 16791.3517025879. The cubic root of 281949492 is about 655.7280655812.

The spelling of 281949492 in words is "two hundred eighty-one million, nine hundred forty-nine thousand, four hundred ninety-two".