8491290 has 32 divisors (see below), whose sum is σ = 21453120. Its totient is φ = 2145024.

The previous prime is 8491277. The next prime is 8491297. The reversal of 8491290 is 921948.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8491297) 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, 6879 + ... + 8018.

It is an arithmetic number, because the mean of its divisors is an integer number (670410).

Almost surely, 2^8491290 is an apocalyptic number.

8491290 is an abundant number, since it is smaller than the sum of its proper divisors (12961830).

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

8491290 is a wasteful number, since it uses less digits than its factorization.

8491290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14926.

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 8491290 is about 2913.9818118856. The cubic root of 8491290 is about 204.0130230056.

The spelling of 8491290 in words is "eight million, four hundred ninety-one thousand, two hundred ninety".