1538488 has 32 divisors (see below), whose sum is σ = 3346560. Its totient is φ = 649440.

The previous prime is 1538473. The next prime is 1538491. The reversal of 1538488 is 8848351.

It is a super-2 number, since 2×1538488² = 4733890652288, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4483 + ... + 4813.

It is an arithmetic number, because the mean of its divisors is an integer number (104580).

2^1538488 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 1538488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1673280).

1538488 is an abundant number, since it is smaller than the sum of its proper divisors (1808072).

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

1538488 is a wasteful number, since it uses less digits than its factorization.

1538488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427 (or 423 counting only the distinct ones).

The product of its digits is 30720, while the sum is 37.

The square root of 1538488 is about 1240.3580128334. The cubic root of 1538488 is about 115.4422291876.

It can be divided in two parts, 15 and 38488, that added together give a triangular number (38503 = T₂₇₇).

The spelling of 1538488 in words is "one million, five hundred thirty-eight thousand, four hundred eighty-eight".