1572056440 has 128 divisors (see below), whose sum is σ = 3840721920. Its totient is φ = 577561600.

The previous prime is 1572056429. The next prime is 1572056441. The reversal of 1572056440 is 446502751.

It is a super-2 number, since 2×1572056440² = 4942722901090947200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1572056396 and 1572056405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1572056441) 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 31 ways as a sum of consecutive naturals, for example, 2677827 + ... + 2678413.

It is an arithmetic number, because the mean of its divisors is an integer number (30005640).

Almost surely, 2^1572056440 is an apocalyptic number.

1572056440 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 1572056440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1920360960).

1572056440 is an abundant number, since it is smaller than the sum of its proper divisors (2268665480).

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

1572056440 is a wasteful number, since it uses less digits than its factorization.

1572056440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 733 (or 729 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 34.

The square root of 1572056440 is about 39649.1669521568. The cubic root of 1572056440 is about 1162.7581118778.

The spelling of 1572056440 in words is "one billion, five hundred seventy-two million, fifty-six thousand, four hundred forty".