73191738 has 32 divisors (see below), whose sum is σ = 150179904. Its totient is φ = 23772672.

The previous prime is 73191733. The next prime is 73191739. The reversal of 73191738 is 83719137.

It is a happy number.

It is a super-2 number, since 2×73191738² = 10714061022921288, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 73191696 and 73191705.

It is not an unprimeable number, because it can be changed into a prime (73191733) 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, 38056 + ... + 39932.

It is an arithmetic number, because the mean of its divisors is an integer number (4693122).

Almost surely, 2^73191738 is an apocalyptic number.

73191738 is an abundant number, since it is smaller than the sum of its proper divisors (76988166).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

73191738 is a wasteful number, since it uses less digits than its factorization.

73191738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2046.

The product of its digits is 31752, while the sum is 39.

The square root of 73191738 is about 8555.2170048456. The cubic root of 73191738 is about 418.2995075726.

The spelling of 73191738 in words is "seventy-three million, one hundred ninety-one thousand, seven hundred thirty-eight".