128982994 has 24 divisors (see below), whose sum is σ = 225646128. Its totient is φ = 55135080.

The previous prime is 128982991. The next prime is 128983009. The reversal of 128982994 is 499289821.

It is a super-2 number, since 2×128982994² = 33273225482408072, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (128982991) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41929 + ... + 44899.

It is an arithmetic number, because the mean of its divisors is an integer number (9401922).

Almost surely, 2^128982994 is an apocalyptic number.

128982994 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

128982994 is a deficient number, since it is larger than the sum of its proper divisors (96663134).

128982994 is a wasteful number, since it uses less digits than its factorization.

128982994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3430 (or 3423 counting only the distinct ones).

The product of its digits is 746496, while the sum is 52.

The square root of 128982994 is about 11357.0680195198. The cubic root of 128982994 is about 505.2552302617.

The spelling of 128982994 in words is "one hundred twenty-eight million, nine hundred eighty-two thousand, nine hundred ninety-four".