72365434 has 4 divisors (see below), whose sum is σ = 108548154. Its totient is φ = 36182716.

The previous prime is 72365399. The next prime is 72365441. The reversal of 72365434 is 43456327.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43456327 = 31 ⋅1401817.

It can be written as a sum of positive squares in only one way, i.e., 49660209 + 22705225 = 7047^2 + 4765^2 .

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 72365434.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18091357 + ... + 18091360.

Almost surely, 2^72365434 is an apocalyptic number.

72365434 is a deficient number, since it is larger than the sum of its proper divisors (36182720).

72365434 is a wasteful number, since it uses less digits than its factorization.

72365434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36182719.

The product of its digits is 60480, while the sum is 34.

The square root of 72365434 is about 8506.7875252648. The cubic root of 72365434 is about 416.7194043825.

The spelling of 72365434 in words is "seventy-two million, three hundred sixty-five thousand, four hundred thirty-four".