128562630 has 64 divisors (see below), whose sum is σ = 359313408. Its totient is φ = 28828800.

The previous prime is 128562613. The next prime is 128562649. The reversal of 128562630 is 36265821.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 128562591 and 128562600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5355 + ... + 16905.

It is an arithmetic number, because the mean of its divisors is an integer number (5614272).

Almost surely, 2^128562630 is an apocalyptic number.

128562630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 128562630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (179656704).

128562630 is an abundant number, since it is smaller than the sum of its proper divisors (230750778).

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

128562630 is a wasteful number, since it uses less digits than its factorization.

128562630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11621.

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

The square root of 128562630 is about 11338.5462031073. The cubic root of 128562630 is about 504.7057462979.

The spelling of 128562630 in words is "one hundred twenty-eight million, five hundred sixty-two thousand, six hundred thirty".