72194738 has 48 divisors (see below), whose sum is σ = 138534624. Its totient is φ = 27901440.

The previous prime is 72194713. The next prime is 72194777. The reversal of 72194738 is 83749127.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 72194695 and 72194704.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 207881 + ... + 208227.

It is an arithmetic number, because the mean of its divisors is an integer number (2886138).

Almost surely, 2^72194738 is an apocalyptic number.

72194738 is a deficient number, since it is larger than the sum of its proper divisors (66339886).

72194738 is a wasteful number, since it uses less digits than its factorization.

72194738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 567 (or 560 counting only the distinct ones).

The product of its digits is 84672, while the sum is 41.

The square root of 72194738 is about 8496.7486722864. The cubic root of 72194738 is about 416.3914930485.

It can be divided in two parts, 721 and 94738, that added together give a palindrome (95459).

The spelling of 72194738 in words is "seventy-two million, one hundred ninety-four thousand, seven hundred thirty-eight".