345328881 has 24 divisors (see below), whose sum is σ = 483557760. Its totient is φ = 219108672.

The previous prime is 345328873. The next prime is 345328889. The reversal of 345328881 is 188823543.

It is an interprime number because it is at equal distance from previous prime (345328873) and next prime (345328889).

It is not a de Polignac number, because 345328881 - 2³ = 345328873 is a prime.

It is a super-2 number, since 2×345328881² = 238504072105424322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345328889) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 192135 + ... + 193923.

It is an arithmetic number, because the mean of its divisors is an integer number (20148240).

Almost surely, 2^345328881 is an apocalyptic number.

It is an amenable number.

345328881 is a deficient number, since it is larger than the sum of its proper divisors (138228879).

345328881 is a wasteful number, since it uses less digits than its factorization.

345328881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1913 (or 1876 counting only the distinct ones).

The product of its digits is 184320, while the sum is 42.

The square root of 345328881 is about 18583.0266910426. The cubic root of 345328881 is about 701.5807006530.

The spelling of 345328881 in words is "three hundred forty-five million, three hundred twenty-eight thousand, eight hundred eighty-one".