365640636 has 96 divisors (see below), whose sum is σ = 927360000. Its totient is φ = 111760128.

The previous prime is 365640631. The next prime is 365640661. The reversal of 365640636 is 636046563.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 365640594 and 365640603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (365640631) 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, 1596570 + ... + 1596798.

It is an arithmetic number, because the mean of its divisors is an integer number (9660000).

Almost surely, 2^365640636 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 365640636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (463680000).

365640636 is an abundant number, since it is smaller than the sum of its proper divisors (561719364).

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

365640636 is a wasteful number, since it uses less digits than its factorization.

365640636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451 (or 449 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 39.

The square root of 365640636 is about 19121.7320345203. The cubic root of 365640636 is about 715.0748196273.

The spelling of 365640636 in words is "three hundred sixty-five million, six hundred forty thousand, six hundred thirty-six".