128888450 has 24 divisors (see below), whose sum is σ = 243801360. Its totient is φ = 50680400.

The previous prime is 128888447. The next prime is 128888453. The reversal of 128888450 is 54888821.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (128888447) and next prime (128888453).

It is a super-2 number, since 2×128888450² = 33224465086805000, which contains 22 as substring.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (128888453) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18896 + ... + 24795.

It is an arithmetic number, because the mean of its divisors is an integer number (10158390).

Almost surely, 2^128888450 is an apocalyptic number.

128888450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128888450 is a deficient number, since it is larger than the sum of its proper divisors (114912910).

128888450 is a wasteful number, since it uses less digits than its factorization.

128888450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43762 (or 43757 counting only the distinct ones).

The product of its (nonzero) digits is 163840, while the sum is 44.

The square root of 128888450 is about 11352.9049146023. The cubic root of 128888450 is about 505.1317500901.

The spelling of 128888450 in words is "one hundred twenty-eight million, eight hundred eighty-eight thousand, four hundred fifty".