72444745 has 8 divisors (see below), whose sum is σ = 89054280. Its totient is φ = 56542080.

The previous prime is 72444731. The next prime is 72444761. The reversal of 72444745 is 54744427.

It can be written as a sum of positive squares in 4 ways, for example, as 466489 + 71978256 = 683^2 + 8484^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 72444745 - 2¹¹ = 72442697 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 176490 + ... + 176899.

It is an arithmetic number, because the mean of its divisors is an integer number (11131785).

Almost surely, 2^72444745 is an apocalyptic number.

It is an amenable number.

72444745 is a deficient number, since it is larger than the sum of its proper divisors (16609535).

72444745 is a wasteful number, since it uses less digits than its factorization.

72444745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353435.

The product of its digits is 125440, while the sum is 37.

The square root of 72444745 is about 8511.4478791801. The cubic root of 72444745 is about 416.8715873793.

The spelling of 72444745 in words is "seventy-two million, four hundred forty-four thousand, seven hundred forty-five".