1889408540428 has 24 divisors (see below), whose sum is σ = 3319488320400. Its totient is φ = 940983656448.

The previous prime is 1889408540389. The next prime is 1889408540441. The reversal of 1889408540428 is 8240458049881.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36302488 + ... + 36354496.

It is an arithmetic number, because the mean of its divisors is an integer number (138312013350).

Almost surely, 2^{1889408540428} is an apocalyptic number.

It is an amenable number.

1889408540428 is a deficient number, since it is larger than the sum of its proper divisors (1430079779972).

1889408540428 is a wasteful number, since it uses less digits than its factorization.

1889408540428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87609 (or 87607 counting only the distinct ones).

The product of its (nonzero) digits is 23592960, while the sum is 61.

The spelling of 1889408540428 in words is "one trillion, eight hundred eighty-nine billion, four hundred eight million, five hundred forty thousand, four hundred twenty-eight".