1538388500 has 48 divisors (see below), whose sum is σ = 3665293632. Its totient is φ = 559412000.

The previous prime is 1538388499. The next prime is 1538388529. The reversal of 1538388500 is 58838351.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 134354 + ... + 145353.

It is an arithmetic number, because the mean of its divisors is an integer number (76360284).

Almost surely, 2^1538388500 is an apocalyptic number.

1538388500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1538388500 is an abundant number, since it is smaller than the sum of its proper divisors (2126905132).

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

1538388500 is a wasteful number, since it uses less digits than its factorization.

1538388500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279737 (or 279725 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 41.

The square root of 1538388500 is about 39222.2959552344. The cubic root of 1538388500 is about 1154.3974043472.

The spelling of 1538388500 in words is "one billion, five hundred thirty-eight million, three hundred eighty-eight thousand, five hundred".