488891138 has 8 divisors (see below), whose sum is σ = 753156732. Its totient is φ = 237838896.

The previous prime is 488891131. The next prime is 488891153. The reversal of 488891138 is 831198884.

It can be written as a sum of positive squares in 2 ways, for example, as 475981489 + 12909649 = 21817^2 + 3593^2 .

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (488891131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3303245 + ... + 3303392.

Almost surely, 2^488891138 is an apocalyptic number.

488891138 is a deficient number, since it is larger than the sum of its proper divisors (264265594).

488891138 is a wasteful number, since it uses less digits than its factorization.

488891138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6606676.

The product of its digits is 442368, while the sum is 50.

The square root of 488891138 is about 22110.8827955828. The cubic root of 488891138 is about 787.7783750208.

The spelling of 488891138 in words is "four hundred eighty-eight million, eight hundred ninety-one thousand, one hundred thirty-eight".