1580444540 has 48 divisors (see below), whose sum is σ = 3473402688. Its totient is φ = 602916864.

The previous prime is 1580444539. The next prime is 1580444549. The reversal of 1580444540 is 454440851.

It is a self number, because there is not a number n which added to its sum of digits gives 1580444540.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1580444549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 157514 + ... + 167246.

It is an arithmetic number, because the mean of its divisors is an integer number (72362556).

Almost surely, 2^1580444540 is an apocalyptic number.

1580444540 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 1580444540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1736701344).

1580444540 is an abundant number, since it is smaller than the sum of its proper divisors (1892958148).

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

1580444540 is a wasteful number, since it uses less digits than its factorization.

1580444540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10118 (or 10116 counting only the distinct ones).

The product of its (nonzero) digits is 51200, while the sum is 35.

The square root of 1580444540 is about 39754.8052441463. The cubic root of 1580444540 is about 1164.8225066833.

The spelling of 1580444540 in words is "one billion, five hundred eighty million, four hundred forty-four thousand, five hundred forty".