1538149888 has 80 divisors (see below), whose sum is σ = 3416607216. Its totient is φ = 685834240.

The previous prime is 1538149853. The next prime is 1538149889. The reversal of 1538149888 is 8889418351.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1538149889) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 295920 + ... + 301072.

Almost surely, 2^1538149888 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 1538149888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1708303608).

1538149888 is an abundant number, since it is smaller than the sum of its proper divisors (1878457328).

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

1538149888 is an equidigital number, since it uses as much as digits as its factorization.

1538149888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5235 (or 5219 counting only the distinct ones).

The product of its digits is 2211840, while the sum is 55.

The square root of 1538149888 is about 39219.2540469601. The cubic root of 1538149888 is about 1154.3377169284.

The spelling of 1538149888 in words is "one billion, five hundred thirty-eight million, one hundred forty-nine thousand, eight hundred eighty-eight".