193981488 has 80 divisors (see below), whose sum is σ = 530382720. Its totient is φ = 60922368.

The previous prime is 193981481. The next prime is 193981499. The reversal of 193981488 is 884189391.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 193981488.

It is not an unprimeable number, because it can be changed into a prime (193981481) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 206556 + ... + 207492.

It is an arithmetic number, because the mean of its divisors is an integer number (6629784).

Almost surely, 2^193981488 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 193981488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (265191360).

193981488 is an abundant number, since it is smaller than the sum of its proper divisors (336401232).

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

193981488 is a wasteful number, since it uses less digits than its factorization.

193981488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1194 (or 1188 counting only the distinct ones).

The product of its digits is 497664, while the sum is 51.

The square root of 193981488 is about 13927.7237192586. The cubic root of 193981488 is about 578.8776233500.

The spelling of 193981488 in words is "one hundred ninety-three million, nine hundred eighty-one thousand, four hundred eighty-eight".