351780 has 96 divisors (see below), whose sum is σ = 1185408. Its totient is φ = 76800.

The previous prime is 351779. The next prime is 351797. The reversal of 351780 is 87153.

It is a self number, because there is not a number n which added to its sum of digits gives 351780.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8560 + ... + 8600.

It is an arithmetic number, because the mean of its divisors is an integer number (12348).

2³⁵¹⁷⁸⁰ is an apocalyptic number.

351780 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 351780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (592704).

351780 is an abundant number, since it is smaller than the sum of its proper divisors (833628).

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

351780 is a wasteful number, since it uses less digits than its factorization.

351780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77 (or 75 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 24.

The square root of 351780 is about 593.1104450269. The cubic root of 351780 is about 70.5922538562.

The spelling of 351780 in words is "three hundred fifty-one thousand, seven hundred eighty".