128620532 has 24 divisors (see below), whose sum is σ = 229676160. Its totient is φ = 63011520.

The previous prime is 128620517. The next prime is 128620537. The reversal of 128620532 is 235026821.

It is a junction number, because it is equal to n+sod(n) for n = 128620495 and 128620504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128620537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41807 + ... + 44777.

It is an arithmetic number, because the mean of its divisors is an integer number (9569840).

Almost surely, 2^128620532 is an apocalyptic number.

It is an amenable number.

128620532 is a deficient number, since it is larger than the sum of its proper divisors (101055628).

128620532 is a wasteful number, since it uses less digits than its factorization.

128620532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3191 (or 3189 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 128620532 is about 11341.0992412552. The cubic root of 128620532 is about 504.7815046682.

The spelling of 128620532 in words is "one hundred twenty-eight million, six hundred twenty thousand, five hundred thirty-two".