281226938 has 4 divisors (see below), whose sum is σ = 421840410. Its totient is φ = 140613468.

The previous prime is 281226931. The next prime is 281226941. The reversal of 281226938 is 839622182.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 150970369 + 130256569 = 12287^2 + 11413^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 281226895 and 281226904.

It is not an unprimeable number, because it can be changed into a prime (281226931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70306733 + ... + 70306736.

Almost surely, 2^281226938 is an apocalyptic number.

281226938 is a deficient number, since it is larger than the sum of its proper divisors (140613472).

281226938 is a wasteful number, since it uses less digits than its factorization.

281226938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140613471.

The product of its digits is 82944, while the sum is 41.

The square root of 281226938 is about 16769.8222411569. The cubic root of 281226938 is about 655.1674400515.

The spelling of 281226938 in words is "two hundred eighty-one million, two hundred twenty-six thousand, nine hundred thirty-eight".