3531861000 has 192 divisors, whose sum is σ = 12323750400. Its totient is φ = 911376000.

The previous prime is 3531860987. The next prime is 3531861007. The reversal of 3531861000 is 1681353.

3531861000 is a `hidden beast` number, since 35 + 3 + 18 + 610 + 0 + 0 = 666.

It is not an unprimeable number, because it can be changed into a prime (3531861007) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 272671 + ... + 285329.

It is an arithmetic number, because the mean of its divisors is an integer number (64186200).

Almost surely, 2^3531861000 is an apocalyptic number.

3531861000 is a gapful number since it is divisible by the number (30) 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 3531861000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6161875200).

3531861000 is an abundant number, since it is smaller than the sum of its proper divisors (8791889400).

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

3531861000 is a wasteful number, since it uses less digits than its factorization.

3531861000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12717 (or 12700 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 3531861000 is about 59429.4623902993. The cubic root of 3531861000 is about 1522.8876604316.

The spelling of 3531861000 in words is "three billion, five hundred thirty-one million, eight hundred sixty-one thousand".