4520389 has 4 divisors (see below), whose sum is σ = 4666240. Its totient is φ = 4374540.

The previous prime is 4520381. The next prime is 4520393. The reversal of 4520389 is 9830254.

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 not a de Polignac number, because 4520389 - 2³ = 4520381 is a prime.

It is a super-2 number, since 2×4520389² = 40867833422642, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 145819 = 4520389 / (4 + 5 + 2 + 0 + 3 + 8 + 9).

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 4520389.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4520381) 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, 72879 + ... + 72940.

It is an arithmetic number, because the mean of its divisors is an integer number (1166560).

Almost surely, 2^4520389 is an apocalyptic number.

It is an amenable number.

4520389 is a deficient number, since it is larger than the sum of its proper divisors (145851).

4520389 is a wasteful number, since it uses less digits than its factorization.

4520389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145850.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 4520389 is about 2126.1206456831. The cubic root of 4520389 is about 165.3453312306.

The spelling of 4520389 in words is "four million, five hundred twenty thousand, three hundred eighty-nine".