1572271540 has 96 divisors (see below), whose sum is σ = 3920716800. Its totient is φ = 518192640.

The previous prime is 1572271529. The next prime is 1572271541. The reversal of 1572271540 is 451722751.

It is a junction number, because it is equal to n+sod(n) for n = 1572271496 and 1572271505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1572271541) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1099546 + ... + 1100974.

It is an arithmetic number, because the mean of its divisors is an integer number (40840800).

Almost surely, 2^1572271540 is an apocalyptic number.

1572271540 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 1572271540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1960358400).

1572271540 is an abundant number, since it is smaller than the sum of its proper divisors (2348445260).

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

1572271540 is a wasteful number, since it uses less digits than its factorization.

1572271540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1745 (or 1743 counting only the distinct ones).

The product of its (nonzero) digits is 19600, while the sum is 34.

The square root of 1572271540 is about 39651.8794006034. The cubic root of 1572271540 is about 1162.8111417515.

The spelling of 1572271540 in words is "one billion, five hundred seventy-two million, two hundred seventy-one thousand, five hundred forty".