128993704 has 32 divisors (see below), whose sum is σ = 279276480. Its totient is φ = 54710784.

The previous prime is 128993699. The next prime is 128993719. The reversal of 128993704 is 407399821.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6442 + ... + 17305.

It is an arithmetic number, because the mean of its divisors is an integer number (8727390).

Almost surely, 2^128993704 is an apocalyptic number.

128993704 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

128993704 is an abundant number, since it is smaller than the sum of its proper divisors (150282776).

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

128993704 is a wasteful number, since it uses less digits than its factorization.

128993704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23857 (or 23853 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 128993704 is about 11357.5395222733. The cubic root of 128993704 is about 505.2692143630.

The spelling of 128993704 in words is "one hundred twenty-eight million, nine hundred ninety-three thousand, seven hundred four".