890258221 has 4 divisors (see below), whose sum is σ = 914319292. Its totient is φ = 866197152.

The previous prime is 890258177. The next prime is 890258231. The reversal of 890258221 is 122852098.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 818246025 + 72012196 = 28605^2 + 8486^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-890258221 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 24061033 = 890258221 / (8 + 9 + 0 + 2 + 5 + 8 + 2 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (890258231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12030480 + ... + 12030553.

It is an arithmetic number, because the mean of its divisors is an integer number (228579823).

Almost surely, 2^890258221 is an apocalyptic number.

It is an amenable number.

890258221 is a deficient number, since it is larger than the sum of its proper divisors (24061071).

890258221 is a wasteful number, since it uses less digits than its factorization.

890258221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24061070.

The product of its (nonzero) digits is 23040, while the sum is 37.

The square root of 890258221 is about 29837.1952602787. The cubic root of 890258221 is about 961.9931898873.

The spelling of 890258221 in words is "eight hundred ninety million, two hundred fifty-eight thousand, two hundred twenty-one".