3689217720 has 96 divisors (see below), whose sum is σ = 12282444720. Its totient is φ = 959792640.

The previous prime is 3689217689. The next prime is 3689217731. The reversal of 3689217720 is 277129863.

3689217720 is a `hidden beast` number, since 368 + 9 + 217 + 72 + 0 = 666.

It is a super-2 number, since 2×3689217720² = 27220654771123996800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 110214 + ... + 139733.

Almost surely, 2^3689217720 is an apocalyptic number.

3689217720 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3689217720 is an abundant number, since it is smaller than the sum of its proper divisors (8593227000).

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

3689217720 is a wasteful number, since it uses less digits than its factorization.

3689217720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250005 (or 249998 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The square root of 3689217720 is about 60738.9308434055. The cubic root of 3689217720 is about 1545.1765029132.

The spelling of 3689217720 in words is "three billion, six hundred eighty-nine million, two hundred seventeen thousand, seven hundred twenty".