343551640 has 96 divisors (see below), whose sum is σ = 831552480. Its totient is φ = 127705088.

The previous prime is 343551629. The next prime is 343551643. The reversal of 343551640 is 46155343.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (343551643) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1306149 + ... + 1306411.

It is an arithmetic number, because the mean of its divisors is an integer number (8662005).

Almost surely, 2^343551640 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 343551640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (415776240).

343551640 is an abundant number, since it is smaller than the sum of its proper divisors (488000840).

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

343551640 is a wasteful number, since it uses less digits than its factorization.

343551640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421 (or 400 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 31.

The square root of 343551640 is about 18535.1460744176. The cubic root of 343551640 is about 700.3750643085.

The spelling of 343551640 in words is "three hundred forty-three million, five hundred fifty-one thousand, six hundred forty".