1571485440 has 576 divisors, whose sum is σ = 6428298240. Its totient is φ = 318504960.

The previous prime is 1571485417. The next prime is 1571485441. The reversal of 1571485440 is 445841751.

1571485440 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×1571485440³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1571485441) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8682150 + ... + 8682330.

It is an arithmetic number, because the mean of its divisors is an integer number (11160240).

Almost surely, 2^1571485440 is an apocalyptic number.

1571485440 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 1571485440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3214149120).

1571485440 is an abundant number, since it is smaller than the sum of its proper divisors (4856812800).

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

1571485440 is a wasteful number, since it uses less digits than its factorization.

1571485440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248 (or 234 counting only the distinct ones).

The product of its (nonzero) digits is 89600, while the sum is 39.

The square root of 1571485440 is about 39641.9656424855. The cubic root of 1571485440 is about 1162.6173164064.

The spelling of 1571485440 in words is "one billion, five hundred seventy-one million, four hundred eighty-five thousand, four hundred forty".