3989487400 has 24 divisors (see below), whose sum is σ = 9275558670. Its totient is φ = 1595794880.

The previous prime is 3989487377. The next prime is 3989487401. The reversal of 3989487400 is 47849893.

It can be written as a sum of positive squares in 3 ways, for example, as 3509614564 + 479872836 = 59242^2 + 21906^2 .

It is not an unprimeable number, because it can be changed into a prime (3989487401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9973519 + ... + 9973918.

Almost surely, 2^3989487400 is an apocalyptic number.

It is an amenable number.

3989487400 is an abundant number, since it is smaller than the sum of its proper divisors (5286071270).

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

3989487400 is a wasteful number, since it uses less digits than its factorization.

3989487400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19947453 (or 19947444 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 52.

The square root of 3989487400 is about 63162.3891251748. The cubic root of 3989487400 is about 1586.0091892222.

The spelling of 3989487400 in words is "three billion, nine hundred eighty-nine million, four hundred eighty-seven thousand, four hundred".