38028510081 has 9 divisors (see below), whose sum is σ = 54930915169. Its totient is φ = 25351950036.

The previous prime is 38028510071. The next prime is 38028510133. The reversal of 38028510081 is 18001582083.

The square root of 38028510081 is 195009.

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

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 38028510081 - 2²¹ = 38026412929 is a prime.

It is a super-2 number, since 2×38028510081² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38028510041) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 552526 + ... + 617528.

Almost surely, 2^38028510081 is an apocalyptic number.

38028510081 is the 195009-th square number.

38028510081 is the 97505-th centered octagonal number.

It is an amenable number.

38028510081 is a deficient number, since it is larger than the sum of its proper divisors (16902405088).

38028510081 is an frugal number, since it uses more digits than its factorization.

38028510081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130012 (or 65006 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 36.

Multiplying 38028510081 by its sum of digits (36), we get a square (1369026362916 = 1170054²).

The spelling of 38028510081 in words is "thirty-eight billion, twenty-eight million, five hundred ten thousand, eighty-one".