4387628 has 24 divisors (see below), whose sum is σ = 8820000. Its totient is φ = 1870848.

The previous prime is 4387619. The next prime is 4387633. The reversal of 4387628 is 8267834.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 4387591 and 4387600.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9548 + ... + 9996.

It is an arithmetic number, because the mean of its divisors is an integer number (367500).

Almost surely, 2^4387628 is an apocalyptic number.

It is an amenable number.

4387628 is an abundant number, since it is smaller than the sum of its proper divisors (4432372).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4387628 is a wasteful number, since it uses less digits than its factorization.

4387628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 809 (or 807 counting only the distinct ones).

The product of its digits is 64512, while the sum is 38.

The square root of 4387628 is about 2094.6665605771. Note that the first 3 decimals coincide. The cubic root of 4387628 is about 163.7105244470.

It can be divided in two parts, 43876 and 28, that multiplied together give a triangular number (1228528 = T₁₅₆₇).

The spelling of 4387628 in words is "four million, three hundred eighty-seven thousand, six hundred twenty-eight".