3989549940 has 48 divisors (see below), whose sum is σ = 11178238848. Its totient is φ = 1063165824.

The previous prime is 3989549917. The next prime is 3989549983. The reversal of 3989549940 is 499459893.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71034 + ... + 114126.

It is an arithmetic number, because the mean of its divisors is an integer number (232879976).

Almost surely, 2^3989549940 is an apocalyptic number.

3989549940 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3989549940 is an abundant number, since it is smaller than the sum of its proper divisors (7188688908).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3989549940 is a wasteful number, since it uses less digits than its factorization.

3989549940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44648 (or 44646 counting only the distinct ones).

The product of its (nonzero) digits is 12597120, while the sum is 60.

The square root of 3989549940 is about 63162.8841963380. The cubic root of 3989549940 is about 1586.0174767110.

The spelling of 3989549940 in words is "three billion, nine hundred eighty-nine million, five hundred forty-nine thousand, nine hundred forty".