1533880 has 32 divisors (see below), whose sum is σ = 3565440. Its totient is φ = 593280.

The previous prime is 1533877. The next prime is 1533881. The reversal of 1533880 is 883351.

It is a Smith number, since the sum of its digits (28) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1533881) by changing a digit.

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, 622 + ... + 1858.

It is an arithmetic number, because the mean of its divisors is an integer number (111420).

2^1533880 is an apocalyptic number.

1533880 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 1533880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1782720).

1533880 is an abundant number, since it is smaller than the sum of its proper divisors (2031560).

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

1533880 is a wasteful number, since it uses less digits than its factorization.

1533880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1279 (or 1275 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 1533880 is about 1238.4990916428. The cubic root of 1533880 is about 115.3268583874.

The spelling of 1533880 in words is "one million, five hundred thirty-three thousand, eight hundred eighty".