72344378 has 4 divisors (see below), whose sum is σ = 108516570. Its totient is φ = 36172188.

The previous prime is 72344351. The next prime is 72344399. The reversal of 72344378 is 87344327.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 50879689 + 21464689 = 7133^2 + 4633^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18086093 + ... + 18086096.

Almost surely, 2^72344378 is an apocalyptic number.

72344378 is a deficient number, since it is larger than the sum of its proper divisors (36172192).

72344378 is a wasteful number, since it uses less digits than its factorization.

72344378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36172191.

The product of its digits is 112896, while the sum is 38.

The square root of 72344378 is about 8505.5498352546. The cubic root of 72344378 is about 416.6789831737.

The spelling of 72344378 in words is "seventy-two million, three hundred forty-four thousand, three hundred seventy-eight".