290726928 has 160 divisors (see below), whose sum is σ = 912798720. Its totient is φ = 88197120.

The previous prime is 290726927. The next prime is 290726939. The reversal of 290726928 is 829627092.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (290726927) 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, 227026 + ... + 228302.

It is an arithmetic number, because the mean of its divisors is an integer number (5704992).

Almost surely, 2^290726928 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 290726928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (456399360).

290726928 is an abundant number, since it is smaller than the sum of its proper divisors (622071792).

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

290726928 is a wasteful number, since it uses less digits than its factorization.

290726928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1342 (or 1330 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 290726928 is about 17050.7163485878. The cubic root of 290726928 is about 662.4631923540.

The spelling of 290726928 in words is "two hundred ninety million, seven hundred twenty-six thousand, nine hundred twenty-eight".