3640836276 has 180 divisors, whose sum is σ = 11957227744. Its totient is φ = 945600480.

The previous prime is 3640836271. The next prime is 3640836289. The reversal of 3640836276 is 6726380463.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3640836271) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 267795 + ... + 281061.

Almost surely, 2^3640836276 is an apocalyptic number.

3640836276 is a gapful number since it is divisible by the number (36) 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 3640836276, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5978613872).

3640836276 is an abundant number, since it is smaller than the sum of its proper divisors (8316391468).

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

3640836276 is a wasteful number, since it uses less digits than its factorization.

3640836276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13312 (or 13290 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 45.

The square root of 3640836276 is about 60339.3426878351. The cubic root of 3640836276 is about 1538.3921313798.

The spelling of 3640836276 in words is "three billion, six hundred forty million, eight hundred thirty-six thousand, two hundred seventy-six".