988189490 has 8 divisors (see below), whose sum is σ = 1778741100. Its totient is φ = 395275792.

The previous prime is 988189483. The next prime is 988189541. The reversal of 988189490 is 94981889.

It can be written as a sum of positive squares in 2 ways, for example, as 984265129 + 3924361 = 31373^2 + 1981^2 .

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49409465 + ... + 49409484.

Almost surely, 2^988189490 is an apocalyptic number.

988189490 is a deficient number, since it is larger than the sum of its proper divisors (790551610).

988189490 is a wasteful number, since it uses less digits than its factorization.

988189490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98818956.

The product of its (nonzero) digits is 1492992, while the sum is 56.

The square root of 988189490 is about 31435.4813864843. The cubic root of 988189490 is about 996.0475621497.

The spelling of 988189490 in words is "nine hundred eighty-eight million, one hundred eighty-nine thousand, four hundred ninety".