3640047 has 8 divisors (see below), whose sum is σ = 4862256. Its totient is φ = 2422272.

The previous prime is 3640037. The next prime is 3640061. The reversal of 3640047 is 7400463.

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

It is not a de Polignac number, because 3640047 - 2⁴ = 3640031 is a prime.

It is an Ulam number.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 3639999 and 3640026.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3640027) 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, 2383 + ... + 3599.

It is an arithmetic number, because the mean of its divisors is an integer number (607782).

Almost surely, 2^3640047 is an apocalyptic number.

3640047 is a deficient number, since it is larger than the sum of its proper divisors (1222209).

3640047 is a wasteful number, since it uses less digits than its factorization.

3640047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2217.

The product of its (nonzero) digits is 2016, while the sum is 24.

The square root of 3640047 is about 1907.8907201410. The cubic root of 3640047 is about 153.8280956946.

The spelling of 3640047 in words is "three million, six hundred forty thousand, forty-seven".