38028188890 has 12 divisors (see below), whose sum is σ = 68451850026. Its totient is φ = 15211028888.

The previous prime is 38028188833. The next prime is 38028188899. The reversal of 38028188890 is 9888182083.

It can be written as a sum of positive squares in only one way, i.e., 34225370001 + 3802818889 = 185001^2 + 61667^2 .

It is a super-2 number, since 2×38028188890² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (38028188899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 585837 + ... + 647503.

Almost surely, 2^38028188890 is an apocalyptic number.

38028188890 is a deficient number, since it is larger than the sum of its proper divisors (30423661136).

38028188890 is an frugal number, since it uses more digits than its factorization.

38028188890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123341 (or 61674 counting only the distinct ones).

The product of its (nonzero) digits is 1769472, while the sum is 55.

The spelling of 38028188890 in words is "thirty-eight billion, twenty-eight million, one hundred eighty-eight thousand, eight hundred ninety".