3185428289 has 4 divisors (see below), whose sum is σ = 3189810624. Its totient is φ = 3181045956.

The previous prime is 3185428229. The next prime is 3185428291. The reversal of 3185428289 is 9828245813.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9828245813 = 379 ⋅25932047.

It is a cyclic number.

It is not a de Polignac number, because 3185428289 - 2¹⁶ = 3185362753 is a prime.

It is a super-2 number, since 2×3185428289² = 20293906768722935042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3185428229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2190077 + ... + 2191530.

It is an arithmetic number, because the mean of its divisors is an integer number (797452656).

Almost surely, 2^3185428289 is an apocalyptic number.

It is an amenable number.

3185428289 is a deficient number, since it is larger than the sum of its proper divisors (4382335).

3185428289 is an equidigital number, since it uses as much as digits as its factorization.

3185428289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4382334.

The product of its digits is 1105920, while the sum is 50.

The square root of 3185428289 is about 56439.5985899971. The cubic root of 3185428289 is about 1471.3724189044.

The spelling of 3185428289 in words is "three billion, one hundred eighty-five million, four hundred twenty-eight thousand, two hundred eighty-nine".