3638501 has 4 divisors (see below), whose sum is σ = 3755904. Its totient is φ = 3521100.

The previous prime is 3638497. The next prime is 3638507. The reversal of 3638501 is 1058363.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1058363 = 79 ⋅13397.

It is a cyclic number.

It is not a de Polignac number, because 3638501 - 2² = 3638497 is a prime.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3638507) 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, 58655 + ... + 58716.

It is an arithmetic number, because the mean of its divisors is an integer number (938976).

Almost surely, 2^3638501 is an apocalyptic number.

3638501 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

3638501 is a deficient number, since it is larger than the sum of its proper divisors (117403).

3638501 is a wasteful number, since it uses less digits than its factorization.

3638501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117402.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 3638501 is about 1907.4855176383. The cubic root of 3638501 is about 153.8063146651.

The spelling of 3638501 in words is "three million, six hundred thirty-eight thousand, five hundred one".