128254478 has 16 divisors (see below), whose sum is σ = 214991280. Its totient is φ = 56875200.

The previous prime is 128254459. The next prime is 128254487. The reversal of 128254478 is 874452821.

It is a super-2 number, since 2×128254478² = 32898422254104968, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70193 + ... + 71996.

It is an arithmetic number, because the mean of its divisors is an integer number (13436955).

Almost surely, 2^128254478 is an apocalyptic number.

128254478 is a deficient number, since it is larger than the sum of its proper divisors (86736802).

128254478 is a wasteful number, since it uses less digits than its factorization.

128254478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142243.

The product of its digits is 143360, while the sum is 41.

The square root of 128254478 is about 11324.9493597102. The cubic root of 128254478 is about 504.3021803183.

The spelling of 128254478 in words is "one hundred twenty-eight million, two hundred fifty-four thousand, four hundred seventy-eight".