345889431 has 12 divisors (see below), whose sum is σ = 513121752. Its totient is φ = 224360496.

The previous prime is 345889393. The next prime is 345889441. The reversal of 345889431 is 134988543.

345889431 is a `hidden beast` number, since 34 + 588 + 9 + 4 + 31 = 666.

It is not a de Polignac number, because 345889431 - 2¹⁵ = 345856663 is a prime.

It is a super-2 number, since 2×345889431² = 239278996955007522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345889441) 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 11 ways as a sum of consecutive naturals, for example, 519021 + ... + 519686.

It is an arithmetic number, because the mean of its divisors is an integer number (42760146).

Almost surely, 2^345889431 is an apocalyptic number.

345889431 is a deficient number, since it is larger than the sum of its proper divisors (167232321).

345889431 is a wasteful number, since it uses less digits than its factorization.

345889431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1038750 (or 1038747 counting only the distinct ones).

The product of its digits is 414720, while the sum is 45.

The square root of 345889431 is about 18598.1028871227. The cubic root of 345889431 is about 701.9601056054.

The spelling of 345889431 in words is "three hundred forty-five million, eight hundred eighty-nine thousand, four hundred thirty-one".