1580740 has 36 divisors (see below), whose sum is σ = 3863916. Its totient is φ = 541632.

The previous prime is 1580737. The next prime is 1580753. The reversal of 1580740 is 470851.

It can be written as a sum of positive squares in 2 ways, for example, as 777924 + 802816 = 882^2 + 896^2 .

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 174 + ... + 1786.

It is an arithmetic number, because the mean of its divisors is an integer number (107331).

2^1580740 is an apocalyptic number.

1580740 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 1580740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1931958).

1580740 is an abundant number, since it is smaller than the sum of its proper divisors (2283176).

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

1580740 is a wasteful number, since it uses less digits than its factorization.

1580740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1636 (or 1627 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 1580740 is about 1257.2748307351. The cubic root of 1580740 is about 116.4895089007.

The spelling of 1580740 in words is "one million, five hundred eighty thousand, seven hundred forty".