38972881389 has 16 divisors (see below), whose sum is σ = 56226290624. Its totient is φ = 23869641600.

The previous prime is 38972881333. The next prime is 38972881417. The reversal of 38972881389 is 98318827983.

It is a happy number.

It is not a de Polignac number, because 38972881389 - 2⁷ = 38972881261 is a prime.

It is a super-2 number, since 2×38972881389² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38972881889) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2359792 + ... + 2376249.

It is an arithmetic number, because the mean of its divisors is an integer number (3514143164).

Almost surely, 2^38972881389 is an apocalyptic number.

38972881389 is a gapful number since it is divisible by the number (39) formed by its first and last digit.

It is an amenable number.

38972881389 is a deficient number, since it is larger than the sum of its proper divisors (17253409235).

38972881389 is a wasteful number, since it uses less digits than its factorization.

38972881389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4736268.

The product of its digits is 41803776, while the sum is 66.

The spelling of 38972881389 in words is "thirty-eight billion, nine hundred seventy-two million, eight hundred eighty-one thousand, three hundred eighty-nine".