342605840 has 80 divisors (see below), whose sum is σ = 828696960. Its totient is φ = 131619840.

The previous prime is 342605807. The next prime is 342605849. The reversal of 342605840 is 48506243.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 342605797 and 342605806.

It is not an unprimeable number, because it can be changed into a prime (342605849) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 218981 + ... + 220539.

It is an arithmetic number, because the mean of its divisors is an integer number (10358712).

Almost surely, 2^342605840 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 342605840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (414348480).

342605840 is an abundant number, since it is smaller than the sum of its proper divisors (486091120).

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

342605840 is a wasteful number, since it uses less digits than its factorization.

342605840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1680 (or 1674 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 32.

The square root of 342605840 is about 18509.6147988012. The cubic root of 342605840 is about 699.7317611700.

The spelling of 342605840 in words is "three hundred forty-two million, six hundred five thousand, eight hundred forty".