351780328620 has 360 divisors, whose sum is σ = 1293556627440. Its totient is φ = 79790780160.

The previous prime is 351780328597. The next prime is 351780328643. The reversal of 351780328620 is 26823087153.

351780328620 is a `hidden beast` number, since 3 + 5 + 17 + 8 + 0 + 3 + 2 + 8 + 620 = 666.

It is an interprime number because it is at equal distance from previous prime (351780328597) and next prime (351780328643).

It is a super-2 number, since 2×351780328620² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 10381866 + ... + 10415694.

It is an arithmetic number, because the mean of its divisors is an integer number (3593212854).

Almost surely, 2^351780328620 is an apocalyptic number.

351780328620 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 351780328620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (646778313720).

351780328620 is an abundant number, since it is smaller than the sum of its proper divisors (941776298820).

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

351780328620 is a wasteful number, since it uses less digits than its factorization.

351780328620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33995 (or 33977 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The spelling of 351780328620 in words is "three hundred fifty-one billion, seven hundred eighty million, three hundred twenty-eight thousand, six hundred twenty".