3978056489 has 4 divisors (see below), whose sum is σ = 4339698000. Its totient is φ = 3616414980.

The previous prime is 3978056477. The next prime is 3978056507. The reversal of 3978056489 is 9846508793.

3978056489 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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: 9846508793 = 11 ⋅895137163.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3978056489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3978056419) 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, 180820739 + ... + 180820760.

It is an arithmetic number, because the mean of its divisors is an integer number (1084924500).

Almost surely, 2^3978056489 is an apocalyptic number.

It is an amenable number.

3978056489 is a deficient number, since it is larger than the sum of its proper divisors (361641511).

3978056489 is a wasteful number, since it uses less digits than its factorization.

3978056489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361641510.

The product of its (nonzero) digits is 13063680, while the sum is 59.

The square root of 3978056489 is about 63071.8359412504. The cubic root of 3978056489 is about 1584.4929649605.

It can be divided in two parts, 39780 and 56489, that added together give a palindrome (96269).

The spelling of 3978056489 in words is "three billion, nine hundred seventy-eight million, fifty-six thousand, four hundred eighty-nine".