3646491 has 4 divisors (see below), whose sum is σ = 4861992. Its totient is φ = 2430992.

The previous prime is 3646481. The next prime is 3646493. The reversal of 3646491 is 1946463.

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

It is a cyclic number.

It is not a de Polignac number, because 3646491 - 2⁶ = 3646427 is a prime.

It is a super-2 number, since 2×3646491² = 26593793226162, which contains 22 as substring.

It is a D-number.

3646491 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3646493) 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, 607746 + ... + 607751.

It is an arithmetic number, because the mean of its divisors is an integer number (1215498).

Almost surely, 2^3646491 is an apocalyptic number.

3646491 is a deficient number, since it is larger than the sum of its proper divisors (1215501).

3646491 is a wasteful number, since it uses less digits than its factorization.

3646491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1215500.

The product of its digits is 15552, while the sum is 33.

The square root of 3646491 is about 1909.5787493581. The cubic root of 3646491 is about 153.9188164896.

The spelling of 3646491 in words is "three million, six hundred forty-six thousand, four hundred ninety-one".