345240840 has 64 divisors (see below), whose sum is σ = 1183685760. Its totient is φ = 78912000.

The previous prime is 345240839. The next prime is 345240899. The reversal of 345240840 is 48042543.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 345240798 and 345240807.

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 15 ways as a sum of consecutive naturals, for example, 204661 + ... + 206340.

It is an arithmetic number, because the mean of its divisors is an integer number (18495090).

Almost surely, 2^345240840 is an apocalyptic number.

345240840 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

345240840 is an abundant number, since it is smaller than the sum of its proper divisors (838444920).

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

345240840 is a wasteful number, since it uses less digits than its factorization.

345240840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411022 (or 411018 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 30.

The square root of 345240840 is about 18580.6576848076. The cubic root of 345240840 is about 701.5210733240.

The spelling of 345240840 in words is "three hundred forty-five million, two hundred forty thousand, eight hundred forty".