1927997884890 has 768 divisors, whose sum is σ = 6645548759040. Its totient is φ = 393242895360.

The previous prime is 1927997884861. The next prime is 1927997884909. The reversal of 1927997884890 is 984887997291.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 3686420169 + ... + 3686420691.

It is an arithmetic number, because the mean of its divisors is an integer number (8653058280).

Almost surely, 2^{1927997884890} is an apocalyptic number.

1927997884890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1927997884890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3322774379520).

1927997884890 is an abundant number, since it is smaller than the sum of its proper divisors (4717550874150).

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

1927997884890 is a wasteful number, since it uses less digits than its factorization.

1927997884890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 984 (or 971 counting only the distinct ones).

The product of its (nonzero) digits is 1316818944, while the sum is 81.

The spelling of 1927997884890 in words is "one trillion, nine hundred twenty-seven billion, nine hundred ninety-seven million, eight hundred eighty-four thousand, eight hundred ninety".