290807642 has 8 divisors (see below), whose sum is σ = 448001076. Its totient is φ = 141473952.

The previous prime is 290807641. The next prime is 290807669. The reversal of 290807642 is 246708092.

It can be written as a sum of positive squares in 2 ways, for example, as 279591841 + 11215801 = 16721^2 + 3349^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 290807596 and 290807605.

It is not an unprimeable number, because it can be changed into a prime (290807641) 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, 1964843 + ... + 1964990.

Almost surely, 2^290807642 is an apocalyptic number.

290807642 is a deficient number, since it is larger than the sum of its proper divisors (157193434).

290807642 is a wasteful number, since it uses less digits than its factorization.

290807642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3929872.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 290807642 is about 17053.0830643611. The cubic root of 290807642 is about 662.5244928408.

The spelling of 290807642 in words is "two hundred ninety million, eight hundred seven thousand, six hundred forty-two".