345687880 has 16 divisors (see below), whose sum is σ = 777797820. Its totient is φ = 138275136.

The previous prime is 345687869. The next prime is 345687949. The reversal of 345687880 is 88786543.

It can be written as a sum of positive squares in 2 ways, for example, as 342176004 + 3511876 = 18498^2 + 1874^2 .

It is a super-2 number, since 2×345687880² = 239000220757788800, which contains 22 as substring.

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, 4321059 + ... + 4321138.

Almost surely, 2^345687880 is an apocalyptic number.

It is an amenable number.

345687880 is an abundant number, since it is smaller than the sum of its proper divisors (432109940).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

345687880 is a wasteful number, since it uses less digits than its factorization.

345687880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8642208 (or 8642204 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 49.

The square root of 345687880 is about 18592.6835072294. The cubic root of 345687880 is about 701.8237342316.

The spelling of 345687880 in words is "three hundred forty-five million, six hundred eighty-seven thousand, eight hundred eighty".