3638780 has 24 divisors (see below), whose sum is σ = 7889280. Its totient is φ = 1408320.

The previous prime is 3638777. The next prime is 3638809. The reversal of 3638780 is 878363.

It is a self number, because there is not a number n which added to its sum of digits gives 3638780.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2315 + ... + 3554.

It is an arithmetic number, because the mean of its divisors is an integer number (328720).

Almost surely, 2^3638780 is an apocalyptic number.

It is an amenable number.

3638780 is an abundant number, since it is smaller than the sum of its proper divisors (4250500).

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

3638780 is a wasteful number, since it uses less digits than its factorization.

3638780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5909 (or 5907 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 3638780 is about 1907.5586491639. The cubic root of 3638780 is about 153.8102458504.

The spelling of 3638780 in words is "three million, six hundred thirty-eight thousand, seven hundred eighty".