72432534 has 16 divisors (see below), whose sum is σ = 145030320. Its totient is φ = 24116640.

The previous prime is 72432533. The next prime is 72432551. The reversal of 72432534 is 43523427.

It is a super-2 number, since 2×72432534² = 10492943963322312, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72432533) 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, 769 + ... + 12060.

It is an arithmetic number, because the mean of its divisors is an integer number (9064395).

Almost surely, 2^72432534 is an apocalyptic number.

72432534 is an abundant number, since it is smaller than the sum of its proper divisors (72597786).

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

72432534 is a wasteful number, since it uses less digits than its factorization.

72432534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13775.

The product of its digits is 20160, while the sum is 30.

The square root of 72432534 is about 8510.7305209365. The cubic root of 72432534 is about 416.8481639872.

The spelling of 72432534 in words is "seventy-two million, four hundred thirty-two thousand, five hundred thirty-four".