290189898 has 64 divisors (see below), whose sum is σ = 685825920. Its totient is φ = 90637056.

The previous prime is 290189849. The next prime is 290189899. The reversal of 290189898 is 898981092.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (290189899) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 259236 + ... + 260352.

It is an arithmetic number, because the mean of its divisors is an integer number (10716030).

Almost surely, 2^290189898 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 290189898, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (342912960).

290189898 is an abundant number, since it is smaller than the sum of its proper divisors (395636022).

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

290189898 is a wasteful number, since it uses less digits than its factorization.

290189898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1428 (or 1422 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 54.

The square root of 290189898 is about 17034.9610507333. The cubic root of 290189898 is about 662.0550408625.

The spelling of 290189898 in words is "two hundred ninety million, one hundred eighty-nine thousand, eight hundred ninety-eight".