3989549278 has 64 divisors (see below), whose sum is σ = 7333724160. Its totient is φ = 1602892800.

The previous prime is 3989549251. The next prime is 3989549323. The reversal of 3989549278 is 8729459893.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 857683 + ... + 862321.

It is an arithmetic number, because the mean of its divisors is an integer number (114589440).

Almost surely, 2^3989549278 is an apocalyptic number.

3989549278 is a deficient number, since it is larger than the sum of its proper divisors (3344174882).

3989549278 is a wasteful number, since it uses less digits than its factorization.

3989549278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4793.

The product of its digits is 39191040, while the sum is 64.

The square root of 3989549278 is about 63162.8789559184. The cubic root of 3989549278 is about 1586.0173889865.

The spelling of 3989549278 in words is "three billion, nine hundred eighty-nine million, five hundred forty-nine thousand, two hundred seventy-eight".