438728307 has 8 divisors (see below), whose sum is σ = 594886080. Its totient is φ = 287528040.

The previous prime is 438728293. The next prime is 438728347. The reversal of 438728307 is 703827834.

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

It is not a de Polignac number, because 438728307 - 2¹² = 438724211 is a prime.

It is not an unprimeable number, because it can be changed into a prime (438728347) 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, 1239169 + ... + 1239522.

It is an arithmetic number, because the mean of its divisors is an integer number (74360760).

Almost surely, 2^438728307 is an apocalyptic number.

438728307 is a deficient number, since it is larger than the sum of its proper divisors (156157773).

438728307 is a wasteful number, since it uses less digits than its factorization.

438728307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2478753.

The product of its (nonzero) digits is 225792, while the sum is 42.

The square root of 438728307 is about 20945.8422365872. The cubic root of 438728307 is about 759.8570293157.

The spelling of 438728307 in words is "four hundred thirty-eight million, seven hundred twenty-eight thousand, three hundred seven".