1572905540 has 24 divisors (see below), whose sum is σ = 3304055832. Its totient is φ = 628980480.

The previous prime is 1572905533. The next prime is 1572905561. The reversal of 1572905540 is 455092751.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 725979136 + 846926404 = 26944^2 + 29102^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1572905494 and 1572905503.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75992 + ... + 94448.

It is an arithmetic number, because the mean of its divisors is an integer number (137668993).

Almost surely, 2^1572905540 is an apocalyptic number.

1572905540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1572905540 is an abundant number, since it is smaller than the sum of its proper divisors (1731150292).

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

1572905540 is a wasteful number, since it uses less digits than its factorization.

1572905540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22727 (or 22725 counting only the distinct ones).

The product of its (nonzero) digits is 63000, while the sum is 38.

The square root of 1572905540 is about 39659.8731717589. The cubic root of 1572905540 is about 1162.9674173852.

The spelling of 1572905540 in words is "one billion, five hundred seventy-two million, nine hundred five thousand, five hundred forty".