345409881 has 8 divisors (see below), whose sum is σ = 460632480. Its totient is φ = 230230272.

The previous prime is 345409879. The next prime is 345409903. The reversal of 345409881 is 188904543.

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

It is not a de Polignac number, because 345409881 - 2¹ = 345409879 is a prime.

It is a super-2 number, since 2×345409881² = 238615971784868322, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (345409811) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 24825 + ... + 36153.

It is an arithmetic number, because the mean of its divisors is an integer number (57579060).

Almost surely, 2^345409881 is an apocalyptic number.

It is an amenable number.

345409881 is a deficient number, since it is larger than the sum of its proper divisors (115222599).

345409881 is a wasteful number, since it uses less digits than its factorization.

345409881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21495.

The product of its (nonzero) digits is 138240, while the sum is 42.

The square root of 345409881 is about 18585.2059714172. The cubic root of 345409881 is about 701.6355503893.

The spelling of 345409881 in words is "three hundred forty-five million, four hundred nine thousand, eight hundred eighty-one".