72407442 has 32 divisors (see below), whose sum is σ = 155992320. Its totient is φ = 22332240.

The previous prime is 72407429. The next prime is 72407443. The reversal of 72407442 is 24470427.

It is not an unprimeable number, because it can be changed into a prime (72407443) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 2484 + ... + 12287.

It is an arithmetic number, because the mean of its divisors is an integer number (4874760).

Almost surely, 2^72407442 is an apocalyptic number.

72407442 is an abundant number, since it is smaller than the sum of its proper divisors (83584878).

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

72407442 is a wasteful number, since it uses less digits than its factorization.

72407442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14838.

The product of its (nonzero) digits is 12544, while the sum is 30.

The square root of 72407442 is about 8509.2562542210. The cubic root of 72407442 is about 416.8000237314.

Adding to 72407442 its reverse (24470427), we get a palindrome (96877869).

The spelling of 72407442 in words is "seventy-two million, four hundred seven thousand, four hundred forty-two".