3686720334 has 64 divisors (see below), whose sum is σ = 8624931840. Its totient is φ = 1038136320.

The previous prime is 3686720329. The next prime is 3686720339. The reversal of 3686720334 is 4330276863.

It is an interprime number because it is at equal distance from previous prime (3686720329) and next prime (3686720339).

It is a super-2 number, since 2×3686720334² = 27183813642258143112, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3686720339) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 67842 + ... + 109434.

It is an arithmetic number, because the mean of its divisors is an integer number (134764560).

Almost surely, 2^3686720334 is an apocalyptic number.

3686720334 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 3686720334, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4312465920).

3686720334 is an abundant number, since it is smaller than the sum of its proper divisors (4938211506).

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

3686720334 is a wasteful number, since it uses less digits than its factorization.

3686720334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41705.

The product of its (nonzero) digits is 435456, while the sum is 42.

The square root of 3686720334 is about 60718.3689998340. The cubic root of 3686720334 is about 1544.8277593098.

The spelling of 3686720334 in words is "three billion, six hundred eighty-six million, seven hundred twenty thousand, three hundred thirty-four".