342139840 has 112 divisors (see below), whose sum is σ = 980236800. Its totient is φ = 111117312.

The previous prime is 342139813. The next prime is 342139867. The reversal of 342139840 is 48931243.

It is an interprime number because it is at equal distance from previous prime (342139813) and next prime (342139867).

It is a tau number, because it is divible by the number of its divisors (112).

It is a junction number, because it is equal to n+sod(n) for n = 342139796 and 342139805.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38541 + ... + 46579.

Almost surely, 2^342139840 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 342139840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (490118400).

342139840 is an abundant number, since it is smaller than the sum of its proper divisors (638096960).

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

342139840 is a wasteful number, since it uses less digits than its factorization.

342139840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8082 (or 8072 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 342139840 is about 18497.0224630885. The cubic root of 342139840 is about 699.4143673286.

The spelling of 342139840 in words is "three hundred forty-two million, one hundred thirty-nine thousand, eight hundred forty".