1535573540 has 48 divisors (see below), whose sum is σ = 3409835520. Its totient is φ = 579260160.

The previous prime is 1535573537. The next prime is 1535573549. The reversal of 1535573540 is 453755351.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a junction number, because it is equal to n+sod(n) for n = 1535573494 and 1535573503.

It is not an unprimeable number, because it can be changed into a prime (1535573549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75680 + ... + 93800.

It is an arithmetic number, because the mean of its divisors is an integer number (71038240).

Almost surely, 2^1535573540 is an apocalyptic number.

1535573540 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 1535573540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1704917760).

1535573540 is an abundant number, since it is smaller than the sum of its proper divisors (1874261980).

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

1535573540 is a wasteful number, since it uses less digits than its factorization.

1535573540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18372 (or 18370 counting only the distinct ones).

The product of its (nonzero) digits is 157500, while the sum is 38.

The square root of 1535573540 is about 39186.3948329009. The cubic root of 1535573540 is about 1153.6928648079.

The spelling of 1535573540 in words is "one billion, five hundred thirty-five million, five hundred seventy-three thousand, five hundred forty".