4387945 has 8 divisors (see below), whose sum is σ = 5318280. Its totient is φ = 3475200.

The previous prime is 4387939. The next prime is 4387969. The reversal of 4387945 is 5497834.

It can be written as a sum of positive squares in 4 ways, for example, as 2458624 + 1929321 = 1568^2 + 1389^2 .

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

It is not a de Polignac number, because 4387945 - 2³ = 4387937 is a prime.

It is a super-2 number, since 2×4387945² = 38508122646050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 4387898 and 4387907.

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, 3840 + ... + 4849.

It is an arithmetic number, because the mean of its divisors is an integer number (664785).

Almost surely, 2^4387945 is an apocalyptic number.

It is an amenable number.

4387945 is a deficient number, since it is larger than the sum of its proper divisors (930335).

4387945 is a wasteful number, since it uses less digits than its factorization.

4387945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8795.

The product of its digits is 120960, while the sum is 40.

The square root of 4387945 is about 2094.7422275784. The cubic root of 4387945 is about 163.7144669710.

The spelling of 4387945 in words is "four million, three hundred eighty-seven thousand, nine hundred forty-five".