1890430839044 has 18 divisors (see below), whose sum is σ = 3636345271902. Its totient is φ = 859286744800.

The previous prime is 1890430839043. The next prime is 1890430839047. The reversal of 1890430839044 is 4409380340981.

It can be written as a sum of positive squares in only one way, i.e., 1473218192644 + 417212646400 = 1213762^2 + 645920^2 .

It is not an unprimeable number, because it can be changed into a prime (1890430839043) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1952923937 + ... + 1952924904.

Almost surely, 2^{1890430839044} is an apocalyptic number.

It is an amenable number.

1890430839044 is a deficient number, since it is larger than the sum of its proper divisors (1745914432858).

1890430839044 is a wasteful number, since it uses less digits than its factorization.

1890430839044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3905848867 (or 3905848854 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 53.

The spelling of 1890430839044 in words is "one trillion, eight hundred ninety billion, four hundred thirty million, eight hundred thirty-nine thousand, forty-four".