345831660 has 192 divisors, whose sum is σ = 1129820160. Its totient is φ = 87713280.

The previous prime is 345831653. The next prime is 345831677. The reversal of 345831660 is 66138543.

345831660 is a `hidden beast` number, since 3 + 4 + 583 + 16 + 60 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1221879 + ... + 1222161.

It is an arithmetic number, because the mean of its divisors is an integer number (5884480).

Almost surely, 2^345831660 is an apocalyptic number.

345831660 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 345831660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (564910080).

345831660 is an abundant number, since it is smaller than the sum of its proper divisors (783988500).

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

345831660 is a wasteful number, since it uses less digits than its factorization.

345831660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405 (or 397 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 345831660 is about 18596.5496799810. The cubic root of 345831660 is about 701.9210226002.

The spelling of 345831660 in words is "three hundred forty-five million, eight hundred thirty-one thousand, six hundred sixty".