918727398 has 48 divisors (see below), whose sum is σ = 2015010816. Its totient is φ = 302505840.

The previous prime is 918727393. The next prime is 918727489. The reversal of 918727398 is 893727819.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (918727393) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 618765 + ... + 620247.

It is an arithmetic number, because the mean of its divisors is an integer number (41979392).

Almost surely, 2^918727398 is an apocalyptic number.

918727398 is an abundant number, since it is smaller than the sum of its proper divisors (1096283418).

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

918727398 is a wasteful number, since it uses less digits than its factorization.

918727398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1889 (or 1886 counting only the distinct ones).

The product of its digits is 1524096, while the sum is 54.

The square root of 918727398 is about 30310.5162938542. The cubic root of 918727398 is about 972.1401705590.

It can be divided in two parts, 9187 and 27398, that added together give a triangular number (36585 = T₂₇₀).

The spelling of 918727398 in words is "nine hundred eighteen million, seven hundred twenty-seven thousand, three hundred ninety-eight".