1538532750 has 64 divisors (see below), whose sum is σ = 3857817600. Its totient is φ = 408391200.

The previous prime is 1538532731. The next prime is 1538532763. The reversal of 1538532750 is 572358351.

It is a junction number, because it is equal to n+sod(n) for n = 1538532699 and 1538532708.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 162651 + ... + 171849.

It is an arithmetic number, because the mean of its divisors is an integer number (60278400).

Almost surely, 2^1538532750 is an apocalyptic number.

1538532750 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1538532750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1928908800).

1538532750 is an abundant number, since it is smaller than the sum of its proper divisors (2319284850).

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

1538532750 is a wasteful number, since it uses less digits than its factorization.

1538532750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9442 (or 9432 counting only the distinct ones).

The product of its (nonzero) digits is 126000, while the sum is 39.

The square root of 1538532750 is about 39224.1347896929. The cubic root of 1538532750 is about 1154.4334846613.

The spelling of 1538532750 in words is "one billion, five hundred thirty-eight million, five hundred thirty-two thousand, seven hundred fifty".