128702994 has 32 divisors (see below), whose sum is σ = 295059456. Its totient is φ = 36662160.

The previous prime is 128702993. The next prime is 128703031. The reversal of 128702994 is 499207821.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (128702993) 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, 10159 + ... + 18989.

It is an arithmetic number, because the mean of its divisors is an integer number (9220608).

Almost surely, 2^128702994 is an apocalyptic number.

128702994 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

128702994 is an abundant number, since it is smaller than the sum of its proper divisors (166356462).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128702994 is a wasteful number, since it uses less digits than its factorization.

128702994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9190.

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 128702994 is about 11344.7341969744. The cubic root of 128702994 is about 504.8893578475.

The spelling of 128702994 in words is "one hundred twenty-eight million, seven hundred two thousand, nine hundred ninety-four".