291028 has 12 divisors (see below), whose sum is σ = 525952. Its totient is φ = 140760.

The previous prime is 291013. The next prime is 291037. The reversal of 291028 is 820192.

291028 is nontrivially palindromic in base 3.

It is a hoax number, since the sum of its digits (22) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1050 + ... + 1297.

2²⁹¹⁰²⁸ is an apocalyptic number.

It is an amenable number.

291028 is a deficient number, since it is larger than the sum of its proper divisors (234924).

291028 is a wasteful number, since it uses less digits than its factorization.

291028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2382 (or 2380 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 291028 is about 539.4701103861. The cubic root of 291028 is about 66.2691792104.

The spelling of 291028 in words is "two hundred ninety-one thousand, twenty-eight".