290263240 has 16 divisors (see below), whose sum is σ = 653092380. Its totient is φ = 116105280.

The previous prime is 290263163. The next prime is 290263241. The reversal of 290263240 is 42362092.

It can be written as a sum of positive squares in 2 ways, for example, as 278689636 + 11573604 = 16694^2 + 3402^2 .

It is a junction number, because it is equal to n+sod(n) for n = 290263199 and 290263208.

It is not an unprimeable number, because it can be changed into a prime (290263241) 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, 3628251 + ... + 3628330.

Almost surely, 2^290263240 is an apocalyptic number.

290263240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

290263240 is an abundant number, since it is smaller than the sum of its proper divisors (362829140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

290263240 is a wasteful number, since it uses less digits than its factorization.

290263240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7256592 (or 7256588 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 290263240 is about 17037.1136053030. The cubic root of 290263240 is about 662.1108116423.

The spelling of 290263240 in words is "two hundred ninety million, two hundred sixty-three thousand, two hundred forty".