290806025 has 12 divisors (see below), whose sum is σ = 360917004. Its totient is φ = 232440000.

The previous prime is 290806013. The next prime is 290806069. The reversal of 290806025 is 520608092.

It can be written as a sum of positive squares in 6 ways, for example, as 51423241 + 239382784 = 7171^2 + 15472^2 .

It is not a de Polignac number, because 290806025 - 2¹⁸ = 290543881 is a prime.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 290805982 and 290806000.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28055 + ... + 36995.

It is an arithmetic number, because the mean of its divisors is an integer number (30076417).

Almost surely, 2^290806025 is an apocalyptic number.

290806025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

290806025 is a deficient number, since it is larger than the sum of its proper divisors (70110979).

290806025 is a wasteful number, since it uses less digits than its factorization.

290806025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10252 (or 10247 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 290806025 is about 17053.0356535134. The cubic root of 290806025 is about 662.5232648766.

The spelling of 290806025 in words is "two hundred ninety million, eight hundred six thousand, twenty-five".