342639720 has 96 divisors (see below), whose sum is σ = 1154855520. Its totient is φ = 91368000.

The previous prime is 342639707. The next prime is 342639733. The reversal of 342639720 is 27936243.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (342639707) and next prime (342639733).

It is a Harshad number since it is a multiple of its sum of digits (36).

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 23 ways as a sum of consecutive naturals, for example, 7906 + ... + 27345.

It is an arithmetic number, because the mean of its divisors is an integer number (12029745).

Almost surely, 2^342639720 is an apocalyptic number.

342639720 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

342639720 is an abundant number, since it is smaller than the sum of its proper divisors (812215800).

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

342639720 is a wasteful number, since it uses less digits than its factorization.

342639720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35277 (or 35261 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 36.

The square root of 342639720 is about 18510.5299762054. The cubic root of 342639720 is about 699.7548257026.

The spelling of 342639720 in words is "three hundred forty-two million, six hundred thirty-nine thousand, seven hundred twenty".