3691621332 has 120 divisors (see below), whose sum is σ = 11678192064. Its totient is φ = 992694528.

The previous prime is 3691621319. The next prime is 3691621343. The reversal of 3691621332 is 2331261963.

It is a happy number.

3691621332 is a `hidden beast` number, since 369 + 162 + 133 + 2 = 666.

3691621332 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 9318 + ... + 86429.

Almost surely, 2^3691621332 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 3691621332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5839096032).

3691621332 is an abundant number, since it is smaller than the sum of its proper divisors (7986570732).

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

3691621332 is a wasteful number, since it uses less digits than its factorization.

3691621332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95787 (or 95776 counting only the distinct ones).

The product of its digits is 34992, while the sum is 36.

The square root of 3691621332 is about 60758.7140416912. The cubic root of 3691621332 is about 1545.5120029904.

The spelling of 3691621332 in words is "three billion, six hundred ninety-one million, six hundred twenty-one thousand, three hundred thirty-two".