286981990 has 16 divisors (see below), whose sum is σ = 530529552. Its totient is φ = 111690144.

The previous prime is 286981949. The next prime is 286981991. The reversal of 286981990 is 99189682.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (286981991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 387444 + ... + 388183.

It is an arithmetic number, because the mean of its divisors is an integer number (33158097).

Almost surely, 2^286981990 is an apocalyptic number.

286981990 is a deficient number, since it is larger than the sum of its proper divisors (243547562).

286981990 is a wasteful number, since it uses less digits than its factorization.

286981990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 775671.

The product of its (nonzero) digits is 559872, while the sum is 52.

The square root of 286981990 is about 16940.5427894150. The cubic root of 286981990 is about 659.6064304905.

The spelling of 286981990 in words is "two hundred eighty-six million, nine hundred eighty-one thousand, nine hundred ninety".