1861888342 has 16 divisors (see below), whose sum is σ = 2808108000. Its totient is φ = 925864960.

The previous prime is 1861888339. The next prime is 1861888349. The reversal of 1861888342 is 2438881681.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1861888349) 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, 342159 + ... + 347557.

It is an arithmetic number, because the mean of its divisors is an integer number (175506750).

Almost surely, 2^1861888342 is an apocalyptic number.

1861888342 is a deficient number, since it is larger than the sum of its proper divisors (946219658).

1861888342 is a wasteful number, since it uses less digits than its factorization.

1861888342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6311.

The product of its digits is 589824, while the sum is 49.

The square root of 1861888342 is about 43149.6041928544. The cubic root of 1861888342 is about 1230.2249884772.

The spelling of 1861888342 in words is "one billion, eight hundred sixty-one million, eight hundred eighty-eight thousand, three hundred forty-two".