72423558 has 40 divisors (see below), whose sum is σ = 163315152. Its totient is φ = 23987664.

The previous prime is 72423551. The next prime is 72423601. The reversal of 72423558 is 85532427.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72423551) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 25716 + ... + 28392.

Almost surely, 2^72423558 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 72423558, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81657576).

72423558 is an abundant number, since it is smaller than the sum of its proper divisors (90891594).

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

72423558 is a wasteful number, since it uses less digits than its factorization.

72423558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2858 (or 2849 counting only the distinct ones).

The product of its digits is 67200, while the sum is 36.

The square root of 72423558 is about 8510.2031703127. The cubic root of 72423558 is about 416.8309443601.

The spelling of 72423558 in words is "seventy-two million, four hundred twenty-three thousand, five hundred fifty-eight".