128699630 has 48 divisors (see below), whose sum is σ = 244109376. Its totient is φ = 48818880.

The previous prime is 128699609. The next prime is 128699671. The reversal of 128699630 is 36996821.

It is a plaindrome in base 16.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1920857 + ... + 1920923.

It is an arithmetic number, because the mean of its divisors is an integer number (5085612).

Almost surely, 2^128699630 is an apocalyptic number.

128699630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128699630 is a deficient number, since it is larger than the sum of its proper divisors (115409746).

128699630 is an equidigital number, since it uses as much as digits as its factorization.

128699630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249 (or 182 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 44.

The square root of 128699630 is about 11344.5859333869. The cubic root of 128699630 is about 504.8849589273.

The spelling of 128699630 in words is "one hundred twenty-eight million, six hundred ninety-nine thousand, six hundred thirty".