128940084 has 72 divisors (see below), whose sum is σ = 401157120. Its totient is φ = 34005312.

The previous prime is 128940073. The next prime is 128940107. The reversal of 128940084 is 480049821.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16404 + ... + 22955.

Almost surely, 2^128940084 is an apocalyptic number.

128940084 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

128940084 is an abundant number, since it is smaller than the sum of its proper divisors (272217036).

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

128940084 is a wasteful number, since it uses less digits than its factorization.

128940084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39389 (or 39384 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 128940084 is about 11355.1787304296. The cubic root of 128940084 is about 505.1991946922.

The spelling of 128940084 in words is "one hundred twenty-eight million, nine hundred forty thousand, eighty-four".