345399928 has 16 divisors (see below), whose sum is σ = 654302880. Its totient is φ = 170919168.

The previous prime is 345399919. The next prime is 345399953. The reversal of 345399928 is 829993543.

It is a super-2 number, since 2×345399928² = 238602220524810368, which contains 22 as substring.

It is a congruent number.

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, 221776 + ... + 223327.

It is an arithmetic number, because the mean of its divisors is an integer number (40893930).

Almost surely, 2^345399928 is an apocalyptic number.

It is an amenable number.

345399928 is a deficient number, since it is larger than the sum of its proper divisors (308902952).

345399928 is a wasteful number, since it uses less digits than its factorization.

345399928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445206 (or 445202 counting only the distinct ones).

The product of its digits is 2099520, while the sum is 52.

The square root of 345399928 is about 18584.9382027490. The cubic root of 345399928 is about 701.6288111054.

The spelling of 345399928 in words is "three hundred forty-five million, three hundred ninety-nine thousand, nine hundred twenty-eight".