72242386 has 4 divisors (see below), whose sum is σ = 108363582. Its totient is φ = 36121192.

The previous prime is 72242377. The next prime is 72242407. The reversal of 72242386 is 68324227.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 68324227 = 3583 ⋅19069.

It can be written as a sum of positive squares in only one way, i.e., 52838361 + 19404025 = 7269^2 + 4405^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18060595 + ... + 18060598.

Almost surely, 2^72242386 is an apocalyptic number.

72242386 is a deficient number, since it is larger than the sum of its proper divisors (36121196).

72242386 is a wasteful number, since it uses less digits than its factorization.

72242386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36121195.

The product of its digits is 32256, while the sum is 34.

The square root of 72242386 is about 8499.5521058465. The cubic root of 72242386 is about 416.4830780182.

The spelling of 72242386 in words is "seventy-two million, two hundred forty-two thousand, three hundred eighty-six".