72433780 has 24 divisors (see below), whose sum is σ = 153683208. Its totient is φ = 28674048.

The previous prime is 72433771. The next prime is 72433783. The reversal of 72433780 is 8733427.

It can be written as a sum of positive squares in 4 ways, for example, as 9897316 + 62536464 = 3146^2 + 7908^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72433783) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16729 + ... + 20608.

It is an arithmetic number, because the mean of its divisors is an integer number (6403467).

Almost surely, 2^72433780 is an apocalyptic number.

It is an amenable number.

72433780 is an abundant number, since it is smaller than the sum of its proper divisors (81249428).

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

72433780 is a wasteful number, since it uses less digits than its factorization.

72433780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37443 (or 37441 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 34.

The square root of 72433780 is about 8510.8037223285. The cubic root of 72433780 is about 416.8505542107.

The spelling of 72433780 in words is "seventy-two million, four hundred thirty-three thousand, seven hundred eighty".