4628821 has 4 divisors (see below), whose sum is σ = 4736512. Its totient is φ = 4521132.

The previous prime is 4628807. The next prime is 4628849. The reversal of 4628821 is 1288264.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4628821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4628851) 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, 53781 + ... + 53866.

It is an arithmetic number, because the mean of its divisors is an integer number (1184128).

Almost surely, 2^4628821 is an apocalyptic number.

It is an amenable number.

4628821 is a deficient number, since it is larger than the sum of its proper divisors (107691).

4628821 is a wasteful number, since it uses less digits than its factorization.

4628821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107690.

The product of its digits is 6144, while the sum is 31.

The square root of 4628821 is about 2151.4694978084. The cubic root of 4628821 is about 166.6569625461.

The spelling of 4628821 in words is "four million, six hundred twenty-eight thousand, eight hundred twenty-one".