351441640 has 64 divisors (see below), whose sum is σ = 866194560. Its totient is φ = 127269120.

The previous prime is 351441631. The next prime is 351441641. The reversal of 351441640 is 46144153.

It is a super-2 number, since 2×351441640² = 247022452651779200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 351441599 and 351441608.

It is not an unprimeable number, because it can be changed into a prime (351441641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 114202 + ... + 117238.

It is an arithmetic number, because the mean of its divisors is an integer number (13534290).

Almost surely, 2^351441640 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 351441640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (433097280).

351441640 is an abundant number, since it is smaller than the sum of its proper divisors (514752920).

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

351441640 is a wasteful number, since it uses less digits than its factorization.

351441640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3322 (or 3318 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 351441640 is about 18746.7767896244. The cubic root of 351441640 is about 705.6961351541.

Adding to 351441640 its reverse (46144153), we get a palindrome (397585793).

It can be divided in two parts, 3514 and 41640, that added together give a palindrome (45154).

The spelling of 351441640 in words is "three hundred fifty-one million, four hundred forty-one thousand, six hundred forty".