342512640 has 132 divisors (see below), whose sum is σ = 1186957044. Its totient is φ = 91324416.

The previous prime is 342512627. The next prime is 342512669. The reversal of 342512640 is 46215243.

342512640 is a `hidden beast` number, since 3 + 4 + 2 + 5 + 12 + 640 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 63489024 + 279023616 = 7968^2 + 16704^2 .

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42364 + ... + 49796.

Almost surely, 2^342512640 is an apocalyptic number.

342512640 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 342512640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (593478522).

342512640 is an abundant number, since it is smaller than the sum of its proper divisors (844444404).

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

342512640 is a wasteful number, since it uses less digits than its factorization.

342512640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7464 (or 7443 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 342512640 is about 18507.0970170905. The cubic root of 342512640 is about 699.6683054366.

Adding to 342512640 its reverse (46215243), we get a palindrome (388727883).

The spelling of 342512640 in words is "three hundred forty-two million, five hundred twelve thousand, six hundred forty".