342445840 has 80 divisors (see below), whose sum is σ = 896656896. Its totient is φ = 120499200.

The previous prime is 342445823. The next prime is 342445843. The reversal of 342445840 is 48544243.

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 = 342445796 and 342445805.

It is not an unprimeable number, because it can be changed into a prime (342445843) 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, 21004 + ... + 33556.

Almost surely, 2^342445840 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 342445840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (448328448).

342445840 is an abundant number, since it is smaller than the sum of its proper divisors (554211056).

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

342445840 is a wasteful number, since it uses less digits than its factorization.

342445840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12608 (or 12602 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 34.

The square root of 342445840 is about 18505.2922160122. The cubic root of 342445840 is about 699.6228172063.

The spelling of 342445840 in words is "three hundred forty-two million, four hundred forty-five thousand, eight hundred forty".