72478842 has 16 divisors (see below), whose sum is σ = 151260480. Its totient is φ = 23109152.

The previous prime is 72478831. The next prime is 72478843. The reversal of 72478842 is 24887427.

It is a junction number, because it is equal to n+sod(n) for n = 72478794 and 72478803.

It is not an unprimeable number, because it can be changed into a prime (72478843) 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, 262467 + ... + 262742.

It is an arithmetic number, because the mean of its divisors is an integer number (9453780).

Almost surely, 2^72478842 is an apocalyptic number.

72478842 is an abundant number, since it is smaller than the sum of its proper divisors (78781638).

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

72478842 is a wasteful number, since it uses less digits than its factorization.

72478842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 525237.

The product of its digits is 200704, while the sum is 42.

The square root of 72478842 is about 8513.4506517628. The cubic root of 72478842 is about 416.9369790148.

The spelling of 72478842 in words is "seventy-two million, four hundred seventy-eight thousand, eight hundred forty-two".