345643140 has 24 divisors (see below), whose sum is σ = 967800960. Its totient is φ = 92171488.

The previous prime is 345643097. The next prime is 345643147. The reversal of 345643140 is 41346543.

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 = 345643098 and 345643107.

It is not an unprimeable number, because it can be changed into a prime (345643147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2880300 + ... + 2880419.

It is an arithmetic number, because the mean of its divisors is an integer number (40325040).

Almost surely, 2^345643140 is an apocalyptic number.

345643140 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

345643140 is an abundant number, since it is smaller than the sum of its proper divisors (622157820).

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

345643140 is a wasteful number, since it uses less digits than its factorization.

345643140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5760731 (or 5760729 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 30.

The square root of 345643140 is about 18591.4803068502. The cubic root of 345643140 is about 701.7934555222.

Adding to 345643140 its reverse (41346543), we get a palindrome (386989683).

The spelling of 345643140 in words is "three hundred forty-five million, six hundred forty-three thousand, one hundred forty".