73128392038 has 64 divisors (see below), whose sum is σ = 126668634624. Its totient is φ = 31398048000.

The previous prime is 73128392033. The next prime is 73128392081. The reversal of 73128392038 is 83029382137.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73128392033) 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 31 ways as a sum of consecutive naturals, for example, 8110953 + ... + 8119963.

It is an arithmetic number, because the mean of its divisors is an integer number (1979197416).

Almost surely, 2^73128392038 is an apocalyptic number.

73128392038 is a deficient number, since it is larger than the sum of its proper divisors (53540242586).

73128392038 is a wasteful number, since it uses less digits than its factorization.

73128392038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9421.

The product of its (nonzero) digits is 435456, while the sum is 46.

Subtracting 73128392038 from its reverse (83029382137), we obtain a palindrome (9900990099).

The spelling of 73128392038 in words is "seventy-three billion, one hundred twenty-eight million, three hundred ninety-two thousand, thirty-eight".