345421540 has 12 divisors (see below), whose sum is σ = 725385276. Its totient is φ = 138168608.

The previous prime is 345421513. The next prime is 345421541. The reversal of 345421540 is 45124543.

It can be written as a sum of positive squares in 2 ways, for example, as 36505764 + 308915776 = 6042^2 + 17576^2 .

It is a junction number, because it is equal to n+sod(n) for n = 345421499 and 345421508.

It is not an unprimeable number, because it can be changed into a prime (345421541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8635519 + ... + 8635558.

It is an arithmetic number, because the mean of its divisors is an integer number (60448773).

Almost surely, 2^345421540 is an apocalyptic number.

It is an amenable number.

345421540 is an abundant number, since it is smaller than the sum of its proper divisors (379963736).

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

345421540 is a wasteful number, since it uses less digits than its factorization.

345421540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17271086 (or 17271084 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 345421540 is about 18585.5196322298. The cubic root of 345421540 is about 701.6434446595.

The spelling of 345421540 in words is "three hundred forty-five million, four hundred twenty-one thousand, five hundred forty".