128354890 has 16 divisors (see below), whose sum is σ = 231285960. Its totient is φ = 51287040.

The previous prime is 128354869. The next prime is 128354903. The reversal of 128354890 is 98453821.

It can be written as a sum of positive squares in 4 ways, for example, as 113401201 + 14953689 = 10649^2 + 3867^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3730 + ... + 16450.

Almost surely, 2^128354890 is an apocalyptic number.

128354890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128354890 is a deficient number, since it is larger than the sum of its proper divisors (102931070).

128354890 is a wasteful number, since it uses less digits than its factorization.

128354890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13737.

The product of its (nonzero) digits is 69120, while the sum is 40.

The square root of 128354890 is about 11329.3817130504. The cubic root of 128354890 is about 504.4337541031.

The spelling of 128354890 in words is "one hundred twenty-eight million, three hundred fifty-four thousand, eight hundred ninety".