1890977895484 has 24 divisors (see below), whose sum is σ = 3536617276080. Its totient is φ = 881555387136.

The previous prime is 1890977895479. The next prime is 1890977895487. The reversal of 1890977895484 is 4845987790981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1890977895487) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129938979 + ... + 129953530.

It is an arithmetic number, because the mean of its divisors is an integer number (147359053170).

Almost surely, 2^{1890977895484} is an apocalyptic number.

It is an amenable number.

1890977895484 is a deficient number, since it is larger than the sum of its proper divisors (1645639380596).

1890977895484 is a wasteful number, since it uses less digits than its factorization.

1890977895484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259892637 (or 259892635 counting only the distinct ones).

The product of its (nonzero) digits is 1463132160, while the sum is 79.

The spelling of 1890977895484 in words is "one trillion, eight hundred ninety billion, nine hundred seventy-seven million, eight hundred ninety-five thousand, four hundred eighty-four".