4640987 has 4 divisors (see below), whose sum is σ = 4998000. Its totient is φ = 4283976.

The previous prime is 4640981. The next prime is 4640989. The reversal of 4640987 is 7890464.

It is a happy number.

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 4640987 - 2⁴ = 4640971 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4640987.

It is not an unprimeable number, because it can be changed into a prime (4640981) 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, 178487 + ... + 178512.

It is an arithmetic number, because the mean of its divisors is an integer number (1249500).

Almost surely, 2^4640987 is an apocalyptic number.

4640987 is a deficient number, since it is larger than the sum of its proper divisors (357013).

4640987 is a wasteful number, since it uses less digits than its factorization.

4640987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357012.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 4640987 is about 2154.2950122952. The cubic root of 4640987 is about 166.8028438155.

The spelling of 4640987 in words is "four million, six hundred forty thousand, nine hundred eighty-seven".