1888978442 has 32 divisors (see below), whose sum is σ = 3237427200. Its totient is φ = 819419328.

The previous prime is 1888978411. The next prime is 1888978451. The reversal of 1888978442 is 2448798881.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47684 + ... + 77792.

It is an arithmetic number, because the mean of its divisors is an integer number (101169600).

Almost surely, 2^1888978442 is an apocalyptic number.

1888978442 is a deficient number, since it is larger than the sum of its proper divisors (1348448758).

1888978442 is a wasteful number, since it uses less digits than its factorization.

1888978442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30270.

The product of its digits is 8257536, while the sum is 59.

The square root of 1888978442 is about 43462.3796173196. The cubic root of 1888978442 is about 1236.1627914912.

The spelling of 1888978442 in words is "one billion, eight hundred eighty-eight million, nine hundred seventy-eight thousand, four hundred forty-two".