9881890612 has 24 divisors (see below), whose sum is σ = 18903276000. Its totient is φ = 4482756960.

The previous prime is 9881890607. The next prime is 9881890619. The reversal of 9881890612 is 2160981889.

It is a self number, because there is not a number n which added to its sum of digits gives 9881890612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9881890619) 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, 203083 + ... + 246994.

It is an arithmetic number, because the mean of its divisors is an integer number (787636500).

Almost surely, 2^9881890612 is an apocalyptic number.

It is an amenable number.

9881890612 is a deficient number, since it is larger than the sum of its proper divisors (9021385388).

9881890612 is a wasteful number, since it uses less digits than its factorization.

9881890612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450591 (or 450589 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 52.

The square root of 9881890612 is about 99407.6989573745. The cubic root of 9881890612 is about 2145.9191104277.

The spelling of 9881890612 in words is "nine billion, eight hundred eighty-one million, eight hundred ninety thousand, six hundred twelve".