1894729542 has 16 divisors (see below), whose sum is σ = 3860958960. Its totient is φ = 619659872.

The previous prime is 1894729541. The next prime is 1894729549. The reversal of 1894729542 is 2459274981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1894729541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2978817 + ... + 2979452.

It is an arithmetic number, because the mean of its divisors is an integer number (241309935).

Almost surely, 2^1894729542 is an apocalyptic number.

1894729542 is an abundant number, since it is smaller than the sum of its proper divisors (1966229418).

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

1894729542 is a wasteful number, since it uses less digits than its factorization.

1894729542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5958327.

The product of its digits is 1451520, while the sum is 51.

The square root of 1894729542 is about 43528.4911523476. The cubic root of 1894729542 is about 1237.4160426257.

The spelling of 1894729542 in words is "one billion, eight hundred ninety-four million, seven hundred twenty-nine thousand, five hundred forty-two".