345612728 has 8 divisors (see below), whose sum is σ = 648023880. Its totient is φ = 172806360.

The previous prime is 345612727. The next prime is 345612767. The reversal of 345612728 is 827216543.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 345612691 and 345612700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345612727) 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 as a sum of consecutive naturals, namely, 21600788 + ... + 21600803.

It is an arithmetic number, because the mean of its divisors is an integer number (81002985).

Almost surely, 2^345612728 is an apocalyptic number.

It is an amenable number.

345612728 is a deficient number, since it is larger than the sum of its proper divisors (302411152).

345612728 is a wasteful number, since it uses less digits than its factorization.

345612728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43201597 (or 43201593 counting only the distinct ones).

The product of its digits is 80640, while the sum is 38.

The square root of 345612728 is about 18590.6623873384. The cubic root of 345612728 is about 701.7728720880.

The spelling of 345612728 in words is "three hundred forty-five million, six hundred twelve thousand, seven hundred twenty-eight".