1729978142 has 16 divisors (see below), whose sum is σ = 2671088400. Its totient is φ = 839720448.

The previous prime is 1729978127. The next prime is 1729978147. The reversal of 1729978142 is 2418799271.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1729978147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7193 + ... + 59259.

It is an arithmetic number, because the mean of its divisors is an integer number (166943025).

Almost surely, 2^1729978142 is an apocalyptic number.

1729978142 is a deficient number, since it is larger than the sum of its proper divisors (941110258).

1729978142 is a wasteful number, since it uses less digits than its factorization.

1729978142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52555.

The product of its digits is 508032, while the sum is 50.

The square root of 1729978142 is about 41593.0059264776. The cubic root of 1729978142 is about 1200.4577286223.

The spelling of 1729978142 in words is "one billion, seven hundred twenty-nine million, nine hundred seventy-eight thousand, one hundred forty-two".