128265630 has 32 divisors (see below), whose sum is σ = 315348768. Its totient is φ = 33369600.

The previous prime is 128265623. The next prime is 128265653. The reversal of 128265630 is 36562821.

It is a junction number, because it is equal to n+sod(n) for n = 128265591 and 128265600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50911 + ... + 53370.

It is an arithmetic number, because the mean of its divisors is an integer number (9854649).

Almost surely, 2^128265630 is an apocalyptic number.

128265630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128265630 is an abundant number, since it is smaller than the sum of its proper divisors (187083138).

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

128265630 is a wasteful number, since it uses less digits than its factorization.

128265630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104332.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 128265630 is about 11325.4417132402. The cubic root of 128265630 is about 504.3167966109.

The spelling of 128265630 in words is "one hundred twenty-eight million, two hundred sixty-five thousand, six hundred thirty".