3636387840 has 224 divisors, whose sum is σ = 11791041696. Its totient is φ = 956825600.

The previous prime is 3636387809. The next prime is 3636387847. The reversal of 3636387840 is 487836363.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 3636387840.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3636387847) 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 15 ways as a sum of consecutive naturals, for example, 12410734 + ... + 12411026.

It is an arithmetic number, because the mean of its divisors is an integer number (52638579).

Almost surely, 2^3636387840 is an apocalyptic number.

3636387840 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 3636387840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5895520848).

3636387840 is an abundant number, since it is smaller than the sum of its proper divisors (8154653856).

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

3636387840 is a wasteful number, since it uses less digits than its factorization.

3636387840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428 (or 404 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 48.

The square root of 3636387840 is about 60302.4696011697. The cubic root of 3636387840 is about 1537.7653314308.

The spelling of 3636387840 in words is "three billion, six hundred thirty-six million, three hundred eighty-seven thousand, eight hundred forty".