128424078 has 24 divisors (see below), whose sum is σ = 292897800. Its totient is φ = 40554864.

The previous prime is 128424067. The next prime is 128424089. The reversal of 128424078 is 870424821.

It is an interprime number because it is at equal distance from previous prime (128424067) and next prime (128424089).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 187413 + ... + 188096.

It is an arithmetic number, because the mean of its divisors is an integer number (12204075).

Almost surely, 2^128424078 is an apocalyptic number.

128424078 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

128424078 is an abundant number, since it is smaller than the sum of its proper divisors (164473722).

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

128424078 is a wasteful number, since it uses less digits than its factorization.

128424078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375536 (or 375533 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 36.

The square root of 128424078 is about 11332.4347781048. The cubic root of 128424078 is about 504.5243739294.

Adding to 128424078 its reverse (870424821), we get a palindrome (998848899).

The spelling of 128424078 in words is "one hundred twenty-eight million, four hundred twenty-four thousand, seventy-eight".