1890909228672 has 64 divisors (see below), whose sum is σ = 5580808497600. Its totient is φ = 630303075072.

The previous prime is 1890909228661. The next prime is 1890909228709. The reversal of 1890909228672 is 2768229090981.

It is a happy number.

1890909228672 is a `hidden beast` number, since 189 + 0 + 90 + 92 + 286 + 7 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×1890909228672² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

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, 273565588 + ... + 273572499.

It is an arithmetic number, because the mean of its divisors is an integer number (87200132775).

Almost surely, 2^{1890909228672} is an apocalyptic number.

1890909228672 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1890909228672 is an abundant number, since it is smaller than the sum of its proper divisors (3689899268928).

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

1890909228672 is an equidigital number, since it uses as much as digits as its factorization.

1890909228672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 547138110 (or 547138092 counting only the distinct ones).

The product of its (nonzero) digits is 15676416, while the sum is 63.

The spelling of 1890909228672 in words is "one trillion, eight hundred ninety billion, nine hundred nine million, two hundred twenty-eight thousand, six hundred seventy-two".