3501816444 has 72 divisors (see below), whose sum is σ = 10133308640. Its totient is φ = 998842752.

The previous prime is 3501816433. The next prime is 3501816449. The reversal of 3501816444 is 4446181053.

3501816444 is a `hidden beast` number, since 3 + 5 + 0 + 1 + 8 + 1 + 644 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 3501816399 and 3501816408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3501816449) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 143142 + ... + 165810.

Almost surely, 2^3501816444 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 3501816444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5066654320).

3501816444 is an abundant number, since it is smaller than the sum of its proper divisors (6631492196).

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

3501816444 is a wasteful number, since it uses less digits than its factorization.

3501816444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23299 (or 23294 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The square root of 3501816444 is about 59176.1475934350. The cubic root of 3501816444 is about 1518.5570973612.

Adding to 3501816444 its reverse (4446181053), we get a palindrome (7947997497).

The spelling of 3501816444 in words is "three billion, five hundred one million, eight hundred sixteen thousand, four hundred forty-four".