72304438 has 8 divisors (see below), whose sum is σ = 111388032. Its totient is φ = 35175096.

The previous prime is 72304411. The next prime is 72304439. The reversal of 72304438 is 83440327.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72304439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 488470 + ... + 488617.

It is an arithmetic number, because the mean of its divisors is an integer number (13923504).

Almost surely, 2^72304438 is an apocalyptic number.

72304438 is a deficient number, since it is larger than the sum of its proper divisors (39083594).

72304438 is a wasteful number, since it uses less digits than its factorization.

72304438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 977126.

The product of its (nonzero) digits is 16128, while the sum is 31.

The square root of 72304438 is about 8503.2016323265. The cubic root of 72304438 is about 416.6022887915.

The spelling of 72304438 in words is "seventy-two million, three hundred four thousand, four hundred thirty-eight".