281494090 has 8 divisors (see below), whose sum is σ = 506689380. Its totient is φ = 112597632.

The previous prime is 281494067. The next prime is 281494091. The reversal of 281494090 is 90494182.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 253478241 + 28015849 = 15921^2 + 5293^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (281494091) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 14074695 + ... + 14074714.

Almost surely, 2^281494090 is an apocalyptic number.

281494090 is a deficient number, since it is larger than the sum of its proper divisors (225195290).

281494090 is a wasteful number, since it uses less digits than its factorization.

281494090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28149416.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 281494090 is about 16777.7856107414. The cubic root of 281494090 is about 655.3748335291.

The spelling of 281494090 in words is "two hundred eighty-one million, four hundred ninety-four thousand, ninety".