3638145 has 16 divisors (see below), whose sum is σ = 6652800. Its totient is φ = 1663104.

The previous prime is 3638113. The next prime is 3638147. The reversal of 3638145 is 5418363.

It is not a de Polignac number, because 3638145 - 2⁵ = 3638113 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (3638147) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17220 + ... + 17429.

It is an arithmetic number, because the mean of its divisors is an integer number (415800).

Almost surely, 2^3638145 is an apocalyptic number.

3638145 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3638145 is a deficient number, since it is larger than the sum of its proper divisors (3014655).

3638145 is a wasteful number, since it uses less digits than its factorization.

3638145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34664.

The product of its digits is 8640, while the sum is 30.

The square root of 3638145 is about 1907.3921987887. The cubic root of 3638145 is about 153.8012982372.

It can be divided in two parts, 36381 and 45, that multiplied together give a triangular number (1637145 = T₁₈₀₉).

The spelling of 3638145 in words is "three million, six hundred thirty-eight thousand, one hundred forty-five".