3689031640 has 384 divisors, whose sum is σ = 10933056000. Its totient is φ = 1111283712.

The previous prime is 3689031631. The next prime is 3689031649. The reversal of 3689031640 is 461309863.

It is an interprime number because it is at equal distance from previous prime (3689031631) and next prime (3689031649).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 3689031593 and 3689031602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3689031649) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 50534644 + ... + 50534716.

It is an arithmetic number, because the mean of its divisors is an integer number (28471500).

Almost surely, 2^3689031640 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 3689031640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5466528000).

3689031640 is an abundant number, since it is smaller than the sum of its proper divisors (7244024360).

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

3689031640 is a wasteful number, since it uses less digits than its factorization.

3689031640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199 (or 188 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 40.

The square root of 3689031640 is about 60737.3990223487. The cubic root of 3689031640 is about 1545.1505234870.

The spelling of 3689031640 in words is "three billion, six hundred eighty-nine million, thirty-one thousand, six hundred forty".