998687432 has 12 divisors (see below), whose sum is σ = 1872706545. Its totient is φ = 499299024.

The previous prime is 998687419. The next prime is 998687449. The reversal of 998687432 is 234786899.

It is a happy number.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 997675396 + 1012036 = 31586^2 + 1006^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=22346.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 83798 + ... + 94970.

Almost surely, 2^998687432 is an apocalyptic number.

It is an amenable number.

998687432 is a deficient number, since it is larger than the sum of its proper divisors (874019113).

998687432 is an frugal number, since it uses more digits than its factorization.

998687432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22352 (or 11175 counting only the distinct ones).

The product of its digits is 5225472, while the sum is 56.

The square root of 998687432 is about 31602.0162647892. The cubic root of 998687432 is about 999.5622857675.

The spelling of 998687432 in words is "nine hundred ninety-eight million, six hundred eighty-seven thousand, four hundred thirty-two".