39358988881 has 3 divisors (see below), whose sum is σ = 39359187273. Its totient is φ = 39358790490.

The previous prime is 39358988857. The next prime is 39358988887. The reversal of 39358988881 is 18888985393.

The square root of 39358988881 is 198391.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 18888985393 = 919 ⋅20553847.

It is not a de Polignac number, because 39358988881 - 2⁹ = 39358988369 is a prime.

It is a super-2 number, since 2×39358988881² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 39358988881.

It is not an unprimeable number, because it can be changed into a prime (39358988887) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 99196 + ... + 297586.

It is an arithmetic number, because the mean of its divisors is an integer number (13119729091).

Almost surely, 2^39358988881 is an apocalyptic number.

39358988881 is the 198391-st square number.

39358988881 is the 99196-th centered octagonal number.

It is an amenable number.

39358988881 is a deficient number, since it is larger than the sum of its proper divisors (198392).

39358988881 is an frugal number, since it uses more digits than its factorization.

39358988881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396782 (or 198391 counting only the distinct ones).

The product of its digits is 119439360, while the sum is 70.

The spelling of 39358988881 in words is "thirty-nine billion, three hundred fifty-eight million, nine hundred eighty-eight thousand, eight hundred eighty-one".