128263830 has 32 divisors (see below), whose sum is σ = 316155744. Its totient is φ = 33278976.

The previous prime is 128263783. The next prime is 128263859. The reversal of 128263830 is 38362821.

It is a super-2 number, since 2×128263830² = 32903220172537800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 128263791 and 128263800.

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, 56667 + ... + 58886.

It is an arithmetic number, because the mean of its divisors is an integer number (9879867).

Almost surely, 2^128263830 is an apocalyptic number.

128263830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128263830 is an abundant number, since it is smaller than the sum of its proper divisors (187891914).

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

128263830 is a wasteful number, since it uses less digits than its factorization.

128263830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115600.

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 128263830 is about 11325.3622458622. The cubic root of 128263830 is about 504.3144375105.

The spelling of 128263830 in words is "one hundred twenty-eight million, two hundred sixty-three thousand, eight hundred thirty".