268787890 has 32 divisors (see below), whose sum is σ = 576979200. Its totient is φ = 88148544.

The previous prime is 268787881. The next prime is 268787891. The reversal of 268787890 is 98787862.

It is not an unprimeable number, because it can be changed into a prime (268787891) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81865 + ... + 85084.

It is an arithmetic number, because the mean of its divisors is an integer number (18030600).

Almost surely, 2^268787890 is an apocalyptic number.

268787890 is an abundant number, since it is smaller than the sum of its proper divisors (308191310).

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

268787890 is a wasteful number, since it uses less digits than its factorization.

268787890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166986.

The product of its (nonzero) digits is 2709504, while the sum is 55.

The square root of 268787890 is about 16394.7519041918. The cubic root of 268787890 is about 645.3617664880.

The spelling of 268787890 in words is "two hundred sixty-eight million, seven hundred eighty-seven thousand, eight hundred ninety".