290961285 has 16 divisors (see below), whose sum is σ = 468939456. Its totient is φ = 154045568.

The previous prime is 290961259. The next prime is 290961299. The reversal of 290961285 is 582169092.

It is a cyclic number.

It is not a de Polignac number, because 290961285 - 2¹¹ = 290959237 is a prime.

It is a congruent number.

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, 68739 + ... + 72848.

It is an arithmetic number, because the mean of its divisors is an integer number (29308716).

Almost surely, 2^290961285 is an apocalyptic number.

It is an amenable number.

290961285 is a deficient number, since it is larger than the sum of its proper divisors (177978171).

290961285 is a wasteful number, since it uses less digits than its factorization.

290961285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141732.

The product of its (nonzero) digits is 77760, while the sum is 42.

The square root of 290961285 is about 17057.5873147406. The cubic root of 290961285 is about 662.6411499416.

It can be divided in two parts, 29096 and 1285, that added together give a triangular number (30381 = T₂₄₆).

The spelling of 290961285 in words is "two hundred ninety million, nine hundred sixty-one thousand, two hundred eighty-five".