72473142 has 32 divisors (see below), whose sum is σ = 175398912. Its totient is φ = 19488384.

The previous prime is 72473083. The next prime is 72473143. The reversal of 72473142 is 24137427.

It is a super-2 number, since 2×72473142² = 10504712622704328, which contains 22 as substring.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72473143) 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 15 ways as a sum of consecutive naturals, for example, 50038 + ... + 51465.

It is an arithmetic number, because the mean of its divisors is an integer number (5481216).

Almost surely, 2^72473142 is an apocalyptic number.

72473142 is an abundant number, since it is smaller than the sum of its proper divisors (102925770).

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

72473142 is a wasteful number, since it uses less digits than its factorization.

72473142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101532.

The product of its digits is 9408, while the sum is 30.

The square root of 72473142 is about 8513.1158808042. The cubic root of 72473142 is about 416.9260489143.

The spelling of 72473142 in words is "seventy-two million, four hundred seventy-three thousand, one hundred forty-two".