290397393 has 96 divisors (see below), whose sum is σ = 523216512. Its totient is φ = 158630400.

The previous prime is 290397391. The next prime is 290397403. The reversal of 290397393 is 393793092.

It is not a de Polignac number, because 290397393 - 2¹ = 290397391 is a prime.

It is a super-2 number, since 2×290397393² = 168661291722392898, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (290397391) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2119621 + ... + 2119757.

It is an arithmetic number, because the mean of its divisors is an integer number (5450172).

Almost surely, 2^290397393 is an apocalyptic number.

It is an amenable number.

290397393 is a deficient number, since it is larger than the sum of its proper divisors (232819119).

290397393 is a wasteful number, since it uses less digits than its factorization.

290397393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237 (or 225 counting only the distinct ones).

The product of its (nonzero) digits is 275562, while the sum is 45.

The square root of 290397393 is about 17041.0502317199. The cubic root of 290397393 is about 662.2128000662.

The spelling of 290397393 in words is "two hundred ninety million, three hundred ninety-seven thousand, three hundred ninety-three".