3989280628 has 24 divisors (see below), whose sum is σ = 7063287840. Its totient is φ = 1971271200.

The previous prime is 3989280619. The next prime is 3989280643. The reversal of 3989280628 is 8260829893.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 218683 + ... + 236221.

It is an arithmetic number, because the mean of its divisors is an integer number (294303660).

Almost surely, 2^3989280628 is an apocalyptic number.

It is an amenable number.

3989280628 is a deficient number, since it is larger than the sum of its proper divisors (3074007212).

3989280628 is a wasteful number, since it uses less digits than its factorization.

3989280628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18207 (or 18205 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 55.

The square root of 3989280628 is about 63160.7522754440. The cubic root of 3989280628 is about 1585.9817882117.

The spelling of 3989280628 in words is "three billion, nine hundred eighty-nine million, two hundred eighty thousand, six hundred twenty-eight".