3638091 has 4 divisors (see below), whose sum is σ = 4850792. Its totient is φ = 2425392.

The previous prime is 3638087. The next prime is 3638113. The reversal of 3638091 is 1908363.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 3638091 - 2² = 3638087 is a prime.

It is a super-2 number, since 2×3638091² = 26471412248562, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3638491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 606346 + ... + 606351.

It is an arithmetic number, because the mean of its divisors is an integer number (1212698).

Almost surely, 2^3638091 is an apocalyptic number.

3638091 is a deficient number, since it is larger than the sum of its proper divisors (1212701).

3638091 is a wasteful number, since it uses less digits than its factorization.

3638091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1212700.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 3638091 is about 1907.3780432835. The cubic root of 3638091 is about 153.8005372898.

The spelling of 3638091 in words is "three million, six hundred thirty-eight thousand, ninety-one".