128854840 has 16 divisors (see below), whose sum is σ = 289923480. Its totient is φ = 51541920.

The previous prime is 128854837. The next prime is 128854853. The reversal of 128854840 is 48458821.

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 3221371 = 128854840 / (1 + 2 + 8 + 8 + 5 + 4 + 8 + 4 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 128854793 and 128854802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1610646 + ... + 1610725.

Almost surely, 2^128854840 is an apocalyptic number.

128854840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128854840 is an abundant number, since it is smaller than the sum of its proper divisors (161068640).

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

128854840 is a wasteful number, since it uses less digits than its factorization.

128854840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3221382 (or 3221378 counting only the distinct ones).

The product of its (nonzero) digits is 81920, while the sum is 40.

The square root of 128854840 is about 11351.4245802014. The cubic root of 128854840 is about 505.0878388525.

The spelling of 128854840 in words is "one hundred twenty-eight million, eight hundred fifty-four thousand, eight hundred forty".