3840459521 has 4 divisors (see below), whose sum is σ = 3964345344. Its totient is φ = 3716573700.

The previous prime is 3840459517. The next prime is 3840459529. The reversal of 3840459521 is 1259540483.

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: 1259540483 = 313 ⋅4024091.

It is a cyclic number.

It is not a de Polignac number, because 3840459521 - 2² = 3840459517 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3840459529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61942865 + ... + 61942926.

It is an arithmetic number, because the mean of its divisors is an integer number (991086336).

Almost surely, 2^3840459521 is an apocalyptic number.

3840459521 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

3840459521 is a deficient number, since it is larger than the sum of its proper divisors (123885823).

3840459521 is a wasteful number, since it uses less digits than its factorization.

3840459521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123885822.

The product of its (nonzero) digits is 172800, while the sum is 41.

The square root of 3840459521 is about 61971.4411725272. The cubic root of 3840459521 is about 1566.0095180002.

The spelling of 3840459521 in words is "three billion, eight hundred forty million, four hundred fifty-nine thousand, five hundred twenty-one".