351981798 has 80 divisors (see below), whose sum is σ = 838552176. Its totient is φ = 98454720.

The previous prime is 351981757. The next prime is 351981809. The reversal of 351981798 is 897189153.

It is a super-2 number, since 2×351981798² = 247782372246625608, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 351981798.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 763288 + ... + 763748.

Almost surely, 2^351981798 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 351981798, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (419276088).

351981798 is an abundant number, since it is smaller than the sum of its proper divisors (486570378).

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

351981798 is an equidigital number, since it uses as much as digits as its factorization.

351981798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 547 (or 526 counting only the distinct ones).

The product of its digits is 544320, while the sum is 51.

The square root of 351981798 is about 18761.1779480927. The cubic root of 351981798 is about 706.0574965144.

The spelling of 351981798 in words is "three hundred fifty-one million, nine hundred eighty-one thousand, seven hundred ninety-eight".