1538617652 has 24 divisors (see below), whose sum is σ = 3163312992.
Its totient is φ = 645573600.
The previous prime is 1538617631. The next prime is 1538617687. The reversal of 1538617652 is 2567168351.
It is a Harshad number since it is a multiple of its sum of digits (44).
It is a congruent number.
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (17) of ones.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1344374 + ... + 1345517.
It is an arithmetic number, because the mean of its divisors is an integer number (131804708).
Almost surely, 21538617652 is an apocalyptic number.
It is an amenable number.
1538617652 is an abundant number, since it is smaller than the sum of its proper divisors (1624695340).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1538617652 is a wasteful number, since it uses less digits than its factorization.
1538617652 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 2689919 (or 2689917 counting only the distinct ones).
The product of its digits is 302400, while the sum is 44.
The square root of 1538617652 is about 39225.2170421019.
The cubic root of 1538617652 is about 1154.4547195920.
The spelling of 1538617652 in words is "one billion, five hundred thirty-eight million, six hundred seventeen thousand, six hundred fifty-two".