128981000890 has 32 divisors (see below), whose sum is σ = 265349706624. Its totient is φ = 44219163840.

The previous prime is 128981000843. The next prime is 128981000903. The reversal of 128981000890 is 98000189821.

It is a self number, because there is not a number n which added to its sum of digits gives 128981000890.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1205685 + ... + 1308295.

It is an arithmetic number, because the mean of its divisors is an integer number (8292178332).

Almost surely, 2^128981000890 is an apocalyptic number.

128981000890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128981000890 is the 179570-th decagonal number.

128981000890 is an abundant number, since it is smaller than the sum of its proper divisors (136368705734).

128981000890 is a wasteful number, since it uses less digits than its factorization.

128981000890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120582.

The product of its (nonzero) digits is 82944, while the sum is 46.

The spelling of 128981000890 in words is "one hundred twenty-eight billion, nine hundred eighty-one million, eight hundred ninety", and thus it is an aban number.