128626386 has 48 divisors (see below), whose sum is σ = 312344256. Its totient is φ = 34585344.

The previous prime is 128626367. The next prime is 128626387. The reversal of 128626386 is 683626821.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (128626387) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6840 + ... + 17436.

It is an arithmetic number, because the mean of its divisors is an integer number (6507172).

Almost surely, 2^128626386 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128626386, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (156172128).

128626386 is an abundant number, since it is smaller than the sum of its proper divisors (183717870).

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

128626386 is a wasteful number, since it uses less digits than its factorization.

128626386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10643 (or 10626 counting only the distinct ones).

The product of its digits is 165888, while the sum is 42.

The square root of 128626386 is about 11341.3573261757. The cubic root of 128626386 is about 504.7891627148.

It can be divided in two parts, 1286 and 26386, that added together give a palindrome (27672).

The spelling of 128626386 in words is "one hundred twenty-eight million, six hundred twenty-six thousand, three hundred eighty-six".