290238426 has 48 divisors (see below), whose sum is σ = 672235200. Its totient is φ = 90277440.

The previous prime is 290238419. The next prime is 290238451. The reversal of 290238426 is 624832092.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8425 + ... + 25523.

It is an arithmetic number, because the mean of its divisors is an integer number (14004900).

Almost surely, 2^290238426 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 290238426, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (336117600).

290238426 is an abundant number, since it is smaller than the sum of its proper divisors (381996774).

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

290238426 is a wasteful number, since it uses less digits than its factorization.

290238426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17171 (or 17168 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 290238426 is about 17036.3853560548. The cubic root of 290238426 is about 662.0919436131.

It can be divided in two parts, 2902 and 38426, that added together give a triangular number (41328 = T₂₈₇).

The spelling of 290238426 in words is "two hundred ninety million, two hundred thirty-eight thousand, four hundred twenty-six".