72440123 has 8 divisors (see below), whose sum is σ = 84146400. Its totient is φ = 61073280.

The previous prime is 72440083. The next prime is 72440131. The reversal of 72440123 is 32104427.

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

It is a cyclic number.

It is not a de Polignac number, because 72440123 - 2²² = 68245819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72440143) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 84398 + ... + 85251.

It is an arithmetic number, because the mean of its divisors is an integer number (10518300).

Almost surely, 2^72440123 is an apocalyptic number.

72440123 is a deficient number, since it is larger than the sum of its proper divisors (11706277).

72440123 is a wasteful number, since it uses less digits than its factorization.

72440123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169717.

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 72440123 is about 8511.1763581775. The cubic root of 72440123 is about 416.8627216732.

The spelling of 72440123 in words is "seventy-two million, four hundred forty thousand, one hundred twenty-three".