290488642 has 16 divisors (see below), whose sum is σ = 438941592. Its totient is φ = 144179200.

The previous prime is 290488589. The next prime is 290488661. The reversal of 290488642 is 246884092.

It can be written as a sum of positive squares in 4 ways, for example, as 271557441 + 18931201 = 16479^2 + 4351^2 .

It is a super-2 number, since 2×290488642² = 168767302262008328, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 180642 + ... + 182242.

Almost surely, 2^290488642 is an apocalyptic number.

290488642 is a deficient number, since it is larger than the sum of its proper divisors (148452950).

290488642 is a wasteful number, since it uses less digits than its factorization.

290488642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2213.

The product of its (nonzero) digits is 221184, while the sum is 43.

The square root of 290488642 is about 17043.7273505533. The cubic root of 290488642 is about 662.2821532230.

The spelling of 290488642 in words is "two hundred ninety million, four hundred eighty-eight thousand, six hundred forty-two".