346638431 has 4 divisors (see below), whose sum is σ = 347066664. Its totient is φ = 346210200.

The previous prime is 346638403. The next prime is 346638541. The reversal of 346638431 is 134836643.

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 346638431 - 2¹⁴ = 346622047 is a prime.

It is a super-2 number, since 2×346638431² = 240316403692283522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (346638031) 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, 212900 + ... + 214521.

It is an arithmetic number, because the mean of its divisors is an integer number (86766666).

Almost surely, 2^346638431 is an apocalyptic number.

346638431 is a deficient number, since it is larger than the sum of its proper divisors (428233).

346638431 is an equidigital number, since it uses as much as digits as its factorization.

346638431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428232.

The product of its digits is 124416, while the sum is 38.

The square root of 346638431 is about 18618.2284603020. The cubic root of 346638431 is about 702.4664225792.

The spelling of 346638431 in words is "three hundred forty-six million, six hundred thirty-eight thousand, four hundred thirty-one".