591990442 has 8 divisors (see below), whose sum is σ = 897963300. Its totient is φ = 292669344.

The previous prime is 591990433. The next prime is 591990457. The reversal of 591990442 is 244099195.

It can be written as a sum of positive squares in 2 ways, for example, as 590927481 + 1062961 = 24309^2 + 1031^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1662717 + ... + 1663072.

Almost surely, 2^591990442 is an apocalyptic number.

591990442 is a deficient number, since it is larger than the sum of its proper divisors (305972858).

591990442 is a wasteful number, since it uses less digits than its factorization.

591990442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3325880.

The product of its (nonzero) digits is 116640, while the sum is 43.

The square root of 591990442 is about 24330.8537047100. The cubic root of 591990442 is about 839.6627718522.

The spelling of 591990442 in words is "five hundred ninety-one million, nine hundred ninety thousand, four hundred forty-two".