4640247 has 10 divisors (see below), whose sum is σ = 6931848. Its totient is φ = 3093444.

The previous prime is 4640231. The next prime is 4640249. The reversal of 4640247 is 7420464.

It is not a de Polignac number, because 4640247 - 2⁴ = 4640231 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

4640247 is a lucky number.

It is a nialpdrome in base 9 and base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 4640247.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4640249) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 28563 + ... + 28724.

Almost surely, 2^4640247 is an apocalyptic number.

4640247 is a deficient number, since it is larger than the sum of its proper divisors (2291601).

4640247 is an equidigital number, since it uses as much as digits as its factorization.

4640247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57299 (or 57290 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 27.

The square root of 4640247 is about 2154.1232555265. The cubic root of 4640247 is about 166.7939778375.

The spelling of 4640247 in words is "four million, six hundred forty thousand, two hundred forty-seven".