1581482480 has 40 divisors (see below), whose sum is σ = 3870474000. Its totient is φ = 599298048.

The previous prime is 1581482479. The next prime is 1581482489. The reversal of 1581482480 is 842841851.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1581482489) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 518705 + ... + 521744.

It is an arithmetic number, because the mean of its divisors is an integer number (96761850).

Almost surely, 2^1581482480 is an apocalyptic number.

1581482480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1581482480 is an abundant number, since it is smaller than the sum of its proper divisors (2288991520).

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

1581482480 is a wasteful number, since it uses less digits than its factorization.

1581482480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1040481 (or 1040475 counting only the distinct ones).

The product of its (nonzero) digits is 81920, while the sum is 41.

The square root of 1581482480 is about 39767.8573725063. The cubic root of 1581482480 is about 1165.0774457777.

The spelling of 1581482480 in words is "one billion, five hundred eighty-one million, four hundred eighty-two thousand, four hundred eighty".