918729438 has 16 divisors (see below), whose sum is σ = 2004500736. Its totient is φ = 278402840.

The previous prime is 918729433. The next prime is 918729491. The reversal of 918729438 is 834927819.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (918729433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6960006 + ... + 6960137.

It is an arithmetic number, because the mean of its divisors is an integer number (125281296).

Almost surely, 2^918729438 is an apocalyptic number.

918729438 is an abundant number, since it is smaller than the sum of its proper divisors (1085771298).

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

918729438 is a wasteful number, since it uses less digits than its factorization.

918729438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13920159.

The product of its digits is 870912, while the sum is 51.

The square root of 918729438 is about 30310.5499455223. The cubic root of 918729438 is about 972.1408900922.

The spelling of 918729438 in words is "nine hundred eighteen million, seven hundred twenty-nine thousand, four hundred thirty-eight".