1897927496890 has 16 divisors (see below), whose sum is σ = 3435354802080. Its totient is φ = 754929819280.

The previous prime is 1897927496887. The next prime is 1897927496893. The reversal of 1897927496890 is 986947297981.

It is an interprime number because it is at equal distance from previous prime (1897927496887) and next prime (1897927496893).

It is a super-2 number, since 2×1897927496890² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1897927496890.

It is not an unprimeable number, because it can be changed into a prime (1897927496893) by changing a digit.

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, 530145556 + ... + 530149135.

It is an arithmetic number, because the mean of its divisors is an integer number (214709675130).

Almost surely, 2^{1897927496890} is an apocalyptic number.

1897927496890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1897927496890 is a deficient number, since it is larger than the sum of its proper divisors (1537427305190).

1897927496890 is a wasteful number, since it uses less digits than its factorization.

1897927496890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1060294877.

The product of its (nonzero) digits is 987614208, while the sum is 79.

The spelling of 1897927496890 in words is "one trillion, eight hundred ninety-seven billion, nine hundred twenty-seven million, four hundred ninety-six thousand, eight hundred ninety".