1538240 has 112 divisors (see below), whose sum is σ = 4389120. Its totient is φ = 506880.

The previous prime is 1538233. The next prime is 1538261. The reversal of 1538240 is 428351.

It is a Harshad number since it is a multiple of its sum of digits (23).

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, 66869 + ... + 66891.

2^1538240 is an apocalyptic number.

1538240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1538240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2194560).

1538240 is an abundant number, since it is smaller than the sum of its proper divisors (2850880).

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

1538240 is a wasteful number, since it uses less digits than its factorization.

1538240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70 (or 60 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 1538240 is about 1240.2580376680. The cubic root of 1538240 is about 115.4360258652.

The spelling of 1538240 in words is "one million, five hundred thirty-eight thousand, two hundred forty".