9918938 has 4 divisors (see below), whose sum is σ = 14878410. Its totient is φ = 4959468.

The previous prime is 9918917. The next prime is 9918941. The reversal of 9918938 is 8398199.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 7252249 + 2666689 = 2693^2 + 1633^2 .

It is a junction number, because it is equal to n+sod(n) for n = 9918892 and 9918901.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2479733 + ... + 2479736.

Almost surely, 2^9918938 is an apocalyptic number.

9918938 is a deficient number, since it is larger than the sum of its proper divisors (4959472).

9918938 is a wasteful number, since it uses less digits than its factorization.

9918938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4959471.

The product of its digits is 139968, while the sum is 47.

The square root of 9918938 is about 3149.4345524237. The cubic root of 9918938 is about 214.8597462765.

The spelling of 9918938 in words is "nine million, nine hundred eighteen thousand, nine hundred thirty-eight".