3500721576 has 192 divisors, whose sum is σ = 11074752000. Its totient is φ = 987707520.

The previous prime is 3500721571. The next prime is 3500721607. The reversal of 3500721576 is 6751270053.

3500721576 is a `hidden beast` number, since 3 + 500 + 72 + 15 + 76 = 666.

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

It is a self number, because there is not a number n which added to its sum of digits gives 3500721576.

It is not an unprimeable number, because it can be changed into a prime (3500721571) 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, 885861 + ... + 889803.

It is an arithmetic number, because the mean of its divisors is an integer number (57681000).

Almost surely, 2^3500721576 is an apocalyptic number.

3500721576 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 3500721576, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5537376000).

3500721576 is an abundant number, since it is smaller than the sum of its proper divisors (7574030424).

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

3500721576 is a wasteful number, since it uses less digits than its factorization.

3500721576 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4044 (or 4037 counting only the distinct ones).

The product of its (nonzero) digits is 44100, while the sum is 36.

The square root of 3500721576 is about 59166.8959469736. The cubic root of 3500721576 is about 1518.3988182789.

The spelling of 3500721576 in words is "three billion, five hundred million, seven hundred twenty-one thousand, five hundred seventy-six".