1572383745 has 28 divisors (see below), whose sum is σ = 2829003156. Its totient is φ = 838602720.

The previous prime is 1572383723. The next prime is 1572383777. The reversal of 1572383745 is 5473832751.

1572383745 is a `hidden beast` number, since 1 + 572 + 3 + 8 + 3 + 74 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 400280049 + 1172103696 = 20007^2 + 34236^2 .

It is not a de Polignac number, because 1572383745 - 2⁵ = 1572383713 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1572383745.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 212046 + ... + 219335.

It is an arithmetic number, because the mean of its divisors is an integer number (101035827).

Almost surely, 2^1572383745 is an apocalyptic number.

1572383745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1572383745 is a deficient number, since it is larger than the sum of its proper divisors (1256619411).

1572383745 is an frugal number, since it uses more digits than its factorization.

1572383745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431404 (or 431389 counting only the distinct ones).

The product of its digits is 705600, while the sum is 45.

The square root of 1572383745 is about 39653.2942515499. The cubic root of 1572383745 is about 1162.8388023935.

The spelling of 1572383745 in words is "one billion, five hundred seventy-two million, three hundred eighty-three thousand, seven hundred forty-five".