290006945 has 16 divisors (see below), whose sum is σ = 353555280. Its totient is φ = 228332544.

The previous prime is 290006933. The next prime is 290006963. The reversal of 290006945 is 549600092.

It can be written as a sum of positive squares in 8 ways, for example, as 20784481 + 269222464 = 4559^2 + 16408^2 .

It is not a de Polignac number, because 290006945 - 2¹⁰ = 290005921 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102287 + ... + 105083.

It is an arithmetic number, because the mean of its divisors is an integer number (22097205).

Almost surely, 2^290006945 is an apocalyptic number.

It is an amenable number.

290006945 is a deficient number, since it is larger than the sum of its proper divisors (63548335).

290006945 is a wasteful number, since it uses less digits than its factorization.

290006945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3124.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 290006945 is about 17029.5902769268. The cubic root of 290006945 is about 661.9158786330.

The spelling of 290006945 in words is "two hundred ninety million, six thousand, nine hundred forty-five".