72432450 has 72 divisors (see below), whose sum is σ = 198338868. Its totient is φ = 18944640.

The previous prime is 72432439. The next prime is 72432533. The reversal of 72432450 is 5423427.

It can be written as a sum of positive squares in 6 ways, for example, as 47900241 + 24532209 = 6921^2 + 4953^2 .

It is an unprimeable number.

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 35 ways as a sum of consecutive naturals, for example, 22332 + ... + 25368.

Almost surely, 2^72432450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 72432450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99169434).

72432450 is an abundant number, since it is smaller than the sum of its proper divisors (125906418).

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

72432450 is a wasteful number, since it uses less digits than its factorization.

72432450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3108 (or 3100 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 27.

The square root of 72432450 is about 8510.7255859885. The cubic root of 72432450 is about 416.8480028476.

Adding to 72432450 its reverse (5423427), we get a palindrome (77855877).

It can be divided in two parts, 72 and 432450, that multiplied together give a square (31136400 = 5580²).

The spelling of 72432450 in words is "seventy-two million, four hundred thirty-two thousand, four hundred fifty".