128737992 has 32 divisors (see below), whose sum is σ = 335839680. Its totient is φ = 41046720.

The previous prime is 128737979. The next prime is 128737993. The reversal of 128737992 is 299737821.

It is not an unprimeable number, because it can be changed into a prime (128737993) by changing a digit.

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, 116059 + ... + 117162.

It is an arithmetic number, because the mean of its divisors is an integer number (10494990).

Almost surely, 2^128737992 is an apocalyptic number.

128737992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

128737992 is an abundant number, since it is smaller than the sum of its proper divisors (207101688).

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

128737992 is a wasteful number, since it uses less digits than its factorization.

128737992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233253 (or 233249 counting only the distinct ones).

The product of its digits is 381024, while the sum is 48.

The square root of 128737992 is about 11346.2765698708. The cubic root of 128737992 is about 504.9351182860.

The spelling of 128737992 in words is "one hundred twenty-eight million, seven hundred thirty-seven thousand, nine hundred ninety-two".