72140445 has 48 divisors (see below), whose sum is σ = 135862272. Its totient is φ = 35199360.

The previous prime is 72140413. The next prime is 72140459. The reversal of 72140445 is 54404127.

72140445 is a `hidden beast` number, since 7 + 214 + 0 + 445 = 666.

It is not a de Polignac number, because 72140445 - 2⁵ = 72140413 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 73810 + ... + 74780.

It is an arithmetic number, because the mean of its divisors is an integer number (2830464).

Almost surely, 2^72140445 is an apocalyptic number.

It is an amenable number.

72140445 is a deficient number, since it is larger than the sum of its proper divisors (63721827).

72140445 is a wasteful number, since it uses less digits than its factorization.

72140445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1122 (or 1119 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 27.

The square root of 72140445 is about 8493.5531434141. The cubic root of 72140445 is about 416.2870864881.

The spelling of 72140445 in words is "seventy-two million, one hundred forty thousand, four hundred forty-five".