351640000 has 140 divisors (see below), whose sum is σ = 892683000. Its totient is φ = 137344000.

The previous prime is 351639991. The next prime is 351640007. The reversal of 351640000 is 46153.

It is a self number, because there is not a number n which added to its sum of digits gives 351640000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (351640007) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2359926 + ... + 2360074.

Almost surely, 2^351640000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 351640000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (446341500).

351640000 is an abundant number, since it is smaller than the sum of its proper divisors (541043000).

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

351640000 is an equidigital number, since it uses as much as digits as its factorization.

351640000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240 (or 215 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 351640000 is about 18752.0665527829. The cubic root of 351640000 is about 705.8288793915.

Adding to 351640000 its reverse (46153), we get a palindrome (351686153).

The spelling of 351640000 in words is "three hundred fifty-one million, six hundred forty thousand".