290428339 has 4 divisors (see below), whose sum is σ = 291419856. Its totient is φ = 289436824.

The previous prime is 290428277. The next prime is 290428351. The reversal of 290428339 is 933824092.

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

It is a cyclic number.

It is not a de Polignac number, because 290428339 - 2²⁵ = 256873907 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (290428399) 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, 495319 + ... + 495904.

It is an arithmetic number, because the mean of its divisors is an integer number (72854964).

Almost surely, 2^290428339 is an apocalyptic number.

290428339 is a deficient number, since it is larger than the sum of its proper divisors (991517).

290428339 is an equidigital number, since it uses as much as digits as its factorization.

290428339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 991516.

The product of its (nonzero) digits is 93312, while the sum is 40.

The square root of 290428339 is about 17041.9581914755. The cubic root of 290428339 is about 662.2363219824.

The spelling of 290428339 in words is "two hundred ninety million, four hundred twenty-eight thousand, three hundred thirty-nine".