290494836 has 54 divisors (see below), whose sum is σ = 762579090. Its totient is φ = 96822864.

The previous prime is 290494829. The next prime is 290494859. The reversal of 290494836 is 638494092.

It can be written as a sum of positive squares in only one way, i.e., 189612900 + 100881936 = 13770^2 + 10044^2 .

It is a tau number, because it is divible by the number of its divisors (54).

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a nialpdrome in base 9.

It is a zygodrome in base 9.

It is a junction number, because it is equal to n+sod(n) for n = 290494791 and 290494800.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 20710 + ... + 31778.

It is an arithmetic number, because the mean of its divisors is an integer number (14121835).

Almost surely, 2^290494836 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 290494836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (381289545).

290494836 is an abundant number, since it is smaller than the sum of its proper divisors (472084254).

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

290494836 is an equidigital number, since it uses as much as digits as its factorization.

290494836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11097 (or 11074 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The square root of 290494836 is about 17043.9090586637. The cubic root of 290494836 is about 662.2868604025.

The spelling of 290494836 in words is "two hundred ninety million, four hundred ninety-four thousand, eight hundred thirty-six".