38890739985 has 16 divisors (see below), whose sum is σ = 62228718720. Its totient is φ = 20740549760.

The previous prime is 38890739983. The next prime is 38890740019. The reversal of 38890739985 is 58993709883.

It is not a de Polignac number, because 38890739985 - 2¹ = 38890739983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (38890739983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 243196 + ... + 370034.

It is an arithmetic number, because the mean of its divisors is an integer number (3889294920).

Almost surely, 2^38890739985 is an apocalyptic number.

It is an amenable number.

38890739985 is a deficient number, since it is larger than the sum of its proper divisors (23337978735).

38890739985 is a wasteful number, since it uses less digits than its factorization.

38890739985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147288.

The product of its (nonzero) digits is 117573120, while the sum is 69.

The spelling of 38890739985 in words is "thirty-eight billion, eight hundred ninety million, seven hundred thirty-nine thousand, nine hundred eighty-five".