128333490 has 32 divisors (see below), whose sum is σ = 317938176. Its totient is φ = 33118080.

The previous prime is 128333479. The next prime is 128333507. The reversal of 128333490 is 94333821.

It is a happy number.

It is a super-3 number, since 3×128333490³ (a number of 25 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68067 + ... + 69926.

It is an arithmetic number, because the mean of its divisors is an integer number (9935568).

Almost surely, 2^128333490 is an apocalyptic number.

128333490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128333490 is an abundant number, since it is smaller than the sum of its proper divisors (189604686).

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

128333490 is a wasteful number, since it uses less digits than its factorization.

128333490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138034.

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 128333490 is about 11328.4372267317. The cubic root of 128333490 is about 504.4057185985.

The spelling of 128333490 in words is "one hundred twenty-eight million, three hundred thirty-three thousand, four hundred ninety".