1787420642 has 64 divisors (see below), whose sum is σ = 3216879360. Its totient is φ = 728994816.

The previous prime is 1787420641. The next prime is 1787420651. The reversal of 1787420642 is 2460247871.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1787420642.

It is not an unprimeable number, because it can be changed into a prime (1787420641) 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, 6315833 + ... + 6316115.

It is an arithmetic number, because the mean of its divisors is an integer number (50263740).

Almost surely, 2^1787420642 is an apocalyptic number.

1787420642 is a deficient number, since it is larger than the sum of its proper divisors (1429458718).

1787420642 is a wasteful number, since it uses less digits than its factorization.

1787420642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555.

The product of its (nonzero) digits is 150528, while the sum is 41.

The square root of 1787420642 is about 42277.8977954202. The cubic root of 1787420642 is about 1213.6000612302.

The spelling of 1787420642 in words is "one billion, seven hundred eighty-seven million, four hundred twenty thousand, six hundred forty-two".