128635038 has 24 divisors (see below), whose sum is σ = 318525168. Its totient is φ = 36752832.

The previous prime is 128635033. The next prime is 128635049. The reversal of 128635038 is 830536821.

128635038 is a `hidden beast` number, since 12 + 8 + 635 + 0 + 3 + 8 = 666.

It is a super-2 number, since 2×128635038² = 33093946002522888, which contains 22 as substring.

It is a zygodrome in base 3.

It is a junction number, because it is equal to n+sod(n) for n = 128634993 and 128635011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128635033) 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, 510331 + ... + 510582.

It is an arithmetic number, because the mean of its divisors is an integer number (13271882).

Almost surely, 2^128635038 is an apocalyptic number.

128635038 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

128635038 is an abundant number, since it is smaller than the sum of its proper divisors (189890130).

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

128635038 is a wasteful number, since it uses less digits than its factorization.

128635038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1020928 (or 1020925 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 128635038 is about 11341.7387555877. The cubic root of 128635038 is about 504.8004806050.

The spelling of 128635038 in words is "one hundred twenty-eight million, six hundred thirty-five thousand, thirty-eight".