3988261538 has 32 divisors (see below), whose sum is σ = 6564948480. Its totient is φ = 1810080000.

The previous prime is 3988261499. The next prime is 3988261549. The reversal of 3988261538 is 8351628893.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 3988261538.

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, 102218 + ... + 135738.

It is an arithmetic number, because the mean of its divisors is an integer number (205154640).

Almost surely, 2^3988261538 is an apocalyptic number.

3988261538 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

3988261538 is a deficient number, since it is larger than the sum of its proper divisors (2576686942).

3988261538 is a wasteful number, since it uses less digits than its factorization.

3988261538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33674.

The product of its digits is 2488320, while the sum is 53.

The square root of 3988261538 is about 63152.6843293300. The cubic root of 3988261538 is about 1585.8467266155.

The spelling of 3988261538 in words is "three billion, nine hundred eighty-eight million, two hundred sixty-one thousand, five hundred thirty-eight".