281040986 has 4 divisors (see below), whose sum is σ = 421561482. Its totient is φ = 140520492.

The previous prime is 281040983. The next prime is 281040997. The reversal of 281040986 is 689040182.

281040986 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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., 189475225 + 91565761 = 13765^2 + 9569^2 .

It is not an unprimeable number, because it can be changed into a prime (281040983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70260245 + ... + 70260248.

Almost surely, 2^281040986 is an apocalyptic number.

281040986 is a deficient number, since it is larger than the sum of its proper divisors (140520496).

281040986 is a wasteful number, since it uses less digits than its factorization.

281040986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140520495.

The product of its (nonzero) digits is 27648, while the sum is 38.

The square root of 281040986 is about 16764.2770795522. The cubic root of 281040986 is about 655.0230056213.

The spelling of 281040986 in words is "two hundred eighty-one million, forty thousand, nine hundred eighty-six".