1785728642 has 16 divisors (see below), whose sum is σ = 2832006240. Its totient is φ = 842141088.

The previous prime is 1785728627. The next prime is 1785728647. The reversal of 1785728642 is 2468275871.

It is not an unprimeable number, because it can be changed into a prime (1785728647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94883 + ... + 112134.

It is an arithmetic number, because the mean of its divisors is an integer number (177000390).

Almost surely, 2^1785728642 is an apocalyptic number.

1785728642 is a deficient number, since it is larger than the sum of its proper divisors (1046277598).

1785728642 is a wasteful number, since it uses less digits than its factorization.

1785728642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207265.

The product of its digits is 1505280, while the sum is 50.

The square root of 1785728642 is about 42257.8826019478. The cubic root of 1785728642 is about 1213.2170028113.

The spelling of 1785728642 in words is "one billion, seven hundred eighty-five million, seven hundred twenty-eight thousand, six hundred forty-two".