128507430 has 16 divisors (see below), whose sum is σ = 308417904. Its totient is φ = 34268640.

The previous prime is 128507429. The next prime is 128507459. The reversal of 128507430 is 34705821.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 4283581 = 128507430 / (1 + 2 + 8 + 5 + 0 + 7 + 4 + 3 + 0).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2141761 + ... + 2141820.

It is an arithmetic number, because the mean of its divisors is an integer number (19276119).

Almost surely, 2^128507430 is an apocalyptic number.

128507430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128507430 is an abundant number, since it is smaller than the sum of its proper divisors (179910474).

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

128507430 is a wasteful number, since it uses less digits than its factorization.

128507430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4283591.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 128507430 is about 11336.1117672684. Note that the first 3 decimals coincide. The cubic root of 128507430 is about 504.6335020139.

The spelling of 128507430 in words is "one hundred twenty-eight million, five hundred seven thousand, four hundred thirty".