9878844490 has 32 divisors (see below), whose sum is σ = 18402007680. Its totient is φ = 3813843264.

The previous prime is 9878844463. The next prime is 9878844491. The reversal of 9878844490 is 944488789.

It is not an unprimeable number, because it can be changed into a prime (9878844491) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1087909 + ... + 1096951.

It is an arithmetic number, because the mean of its divisors is an integer number (575062740).

Almost surely, 2^9878844490 is an apocalyptic number.

9878844490 is a deficient number, since it is larger than the sum of its proper divisors (8523163190).

9878844490 is a wasteful number, since it uses less digits than its factorization.

9878844490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12846.

The product of its (nonzero) digits is 18579456, while the sum is 61.

The square root of 9878844490 is about 99392.3764179125. The cubic root of 9878844490 is about 2145.6985924641.

The spelling of 9878844490 in words is "nine billion, eight hundred seventy-eight million, eight hundred forty-four thousand, four hundred ninety".