128420532 has 48 divisors (see below), whose sum is σ = 340697280. Its totient is φ = 41809824.

The previous prime is 128420527. The next prime is 128420549. The reversal of 128420532 is 235024821.

128420532 is a `hidden beast` number, since 128 + 4 + 2 + 0 + 532 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 128420496 and 128420505.

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, 9183 + ... + 18470.

It is an arithmetic number, because the mean of its divisors is an integer number (7097860).

Almost surely, 2^128420532 is an apocalyptic number.

128420532 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

128420532 is an abundant number, since it is smaller than the sum of its proper divisors (212276748).

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

128420532 is a wasteful number, since it uses less digits than its factorization.

128420532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27709 (or 27701 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 128420532 is about 11332.2783234441. The cubic root of 128420532 is about 504.5197303041.

The spelling of 128420532 in words is "one hundred twenty-eight million, four hundred twenty thousand, five hundred thirty-two".