3643870356 has 72 divisors (see below), whose sum is σ = 10543478400. Its totient is φ = 1039450176.

The previous prime is 3643870343. The next prime is 3643870397. The reversal of 3643870356 is 6530783463.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 151870 + ... + 174218.

It is an arithmetic number, because the mean of its divisors is an integer number (146437200).

Almost surely, 2^3643870356 is an apocalyptic number.

3643870356 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3643870356, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5271739200).

3643870356 is an abundant number, since it is smaller than the sum of its proper divisors (6899608044).

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

3643870356 is a wasteful number, since it uses less digits than its factorization.

3643870356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23013 (or 23008 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 45.

The square root of 3643870356 is about 60364.4792572586. The cubic root of 3643870356 is about 1538.8193508852.

The spelling of 3643870356 in words is "three billion, six hundred forty-three million, eight hundred seventy thousand, three hundred fifty-six".