290432431 has 4 divisors (see below), whose sum is σ = 303059952. Its totient is φ = 277804912.

The previous prime is 290432399. The next prime is 290432473. The reversal of 290432431 is 134234092.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 290432431 - 2⁵ = 290432399 is a prime.

It is a super-2 number, since 2×290432431² = 168701993953139522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 290432431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (290432491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6313726 + ... + 6313771.

It is an arithmetic number, because the mean of its divisors is an integer number (75764988).

Almost surely, 2^290432431 is an apocalyptic number.

290432431 is a deficient number, since it is larger than the sum of its proper divisors (12627521).

290432431 is a wasteful number, since it uses less digits than its factorization.

290432431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12627520.

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

The square root of 290432431 is about 17042.0782476786. The cubic root of 290432431 is about 662.2394321682.

The spelling of 290432431 in words is "two hundred ninety million, four hundred thirty-two thousand, four hundred thirty-one".