1538988 has 48 divisors (see below), whose sum is σ = 3991680. Its totient is φ = 457600.

The previous prime is 1538983. The next prime is 1538989. The reversal of 1538988 is 8898351.

It is not an unprimeable number, because it can be changed into a prime (1538983) 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, 11683 + ... + 11813.

It is an arithmetic number, because the mean of its divisors is an integer number (83160).

2^1538988 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 1538988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1995840).

1538988 is an abundant number, since it is smaller than the sum of its proper divisors (2452692).

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

1538988 is a wasteful number, since it uses less digits than its factorization.

1538988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238 (or 236 counting only the distinct ones).

The product of its digits is 69120, while the sum is 42.

The square root of 1538988 is about 1240.5595511704. The cubic root of 1538988 is about 115.4547338595.

The spelling of 1538988 in words is "one million, five hundred thirty-eight thousand, nine hundred eighty-eight".