268657890 has 16 divisors (see below), whose sum is σ = 644779008. Its totient is φ = 71642096.

The previous prime is 268657889. The next prime is 268657951. The reversal of 268657890 is 98756862.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4477602 + ... + 4477661.

It is an arithmetic number, because the mean of its divisors is an integer number (40298688).

Almost surely, 2^268657890 is an apocalyptic number.

268657890 is an abundant number, since it is smaller than the sum of its proper divisors (376121118).

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

268657890 is a wasteful number, since it uses less digits than its factorization.

268657890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8955273.

The product of its (nonzero) digits is 1451520, while the sum is 51.

The square root of 268657890 is about 16390.7867413373. The cubic root of 268657890 is about 645.2577060472.

The spelling of 268657890 in words is "two hundred sixty-eight million, six hundred fifty-seven thousand, eight hundred ninety".