72193394 has 16 divisors (see below), whose sum is σ = 133280448. Its totient is φ = 28559952.

The previous prime is 72193393. The next prime is 72193397. The reversal of 72193394 is 49339127.

It is a super-2 number, since 2×72193394² = 10423772274478472, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (72193393) 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 7 ways as a sum of consecutive naturals, for example, 198152 + ... + 198515.

It is an arithmetic number, because the mean of its divisors is an integer number (8330028).

Almost surely, 2^72193394 is an apocalyptic number.

72193394 is a deficient number, since it is larger than the sum of its proper divisors (61087054).

72193394 is a wasteful number, since it uses less digits than its factorization.

72193394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396689.

The product of its digits is 40824, while the sum is 38.

The square root of 72193394 is about 8496.6695828424. The cubic root of 72193394 is about 416.3889091407.

The spelling of 72193394 in words is "seventy-two million, one hundred ninety-three thousand, three hundred ninety-four".