351820986 has 64 divisors (see below), whose sum is σ = 813611520. Its totient is φ = 100301760.

The previous prime is 351820979. The next prime is 351820999. The reversal of 351820986 is 689028153.

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, 195985 + ... + 197771.

It is an arithmetic number, because the mean of its divisors is an integer number (12712680).

Almost surely, 2^351820986 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 351820986, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (406805760).

351820986 is an abundant number, since it is smaller than the sum of its proper divisors (461790534).

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

351820986 is a wasteful number, since it uses less digits than its factorization.

351820986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1979.

The product of its (nonzero) digits is 103680, while the sum is 42.

The square root of 351820986 is about 18756.8916934550. The cubic root of 351820986 is about 705.9499532506.

The spelling of 351820986 in words is "three hundred fifty-one million, eight hundred twenty thousand, nine hundred eighty-six".