3646387 has 8 divisors (see below), whose sum is σ = 3777200. Its totient is φ = 3517344.

The previous prime is 3646369. The next prime is 3646393. The reversal of 3646387 is 7836463.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3646387 - 2¹¹ = 3644339 is a prime.

It is a super-2 number, since 2×3646387² = 26592276307538, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3646337) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4789 + ... + 5497.

It is an arithmetic number, because the mean of its divisors is an integer number (472150).

Almost surely, 2^3646387 is an apocalyptic number.

3646387 is a gapful number since it is divisible by the number (37) formed by its first and last digit.

3646387 is a deficient number, since it is larger than the sum of its proper divisors (130813).

3646387 is a wasteful number, since it uses less digits than its factorization.

3646387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 885.

The product of its digits is 72576, while the sum is 37.

The square root of 3646387 is about 1909.5515180272. The cubic root of 3646387 is about 153.9173531916.

Subtracting from 3646387 its sum of digits (37), we obtain a triangular number (3646350 = T₂₇₀₀).

The spelling of 3646387 in words is "three million, six hundred forty-six thousand, three hundred eighty-seven".