72405858 has 32 divisors (see below), whose sum is σ = 166440960. Its totient is φ = 20569680.

The previous prime is 72405857. The next prime is 72405869. The reversal of 72405858 is 85850427.

It is not an unprimeable number, because it can be changed into a prime (72405857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2703 + ... + 12333.

It is an arithmetic number, because the mean of its divisors is an integer number (5201280).

Almost surely, 2^72405858 is an apocalyptic number.

72405858 is an abundant number, since it is smaller than the sum of its proper divisors (94035102).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72405858 is a wasteful number, since it uses less digits than its factorization.

72405858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9822.

The product of its (nonzero) digits is 89600, while the sum is 39.

The square root of 72405858 is about 8509.1631785975. The cubic root of 72405858 is about 416.7969843750.

The spelling of 72405858 in words is "seventy-two million, four hundred five thousand, eight hundred fifty-eight".