128336740 has 48 divisors (see below), whose sum is σ = 326132352. Its totient is φ = 41412096.

The previous prime is 128336713. The next prime is 128336749. The reversal of 128336740 is 47633821.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a junction number, because it is equal to n+sod(n) for n = 128336696 and 128336705.

It is not an unprimeable number, because it can be changed into a prime (128336749) 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 15 ways as a sum of consecutive naturals, for example, 24582 + ... + 29341.

It is an arithmetic number, because the mean of its divisors is an integer number (6794424).

Almost surely, 2^128336740 is an apocalyptic number.

128336740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128336740 is an abundant number, since it is smaller than the sum of its proper divisors (197795612).

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

128336740 is a wasteful number, since it uses less digits than its factorization.

128336740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53956 (or 53954 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 128336740 is about 11328.5806701458. The cubic root of 128336740 is about 504.4099765277.

The spelling of 128336740 in words is "one hundred twenty-eight million, three hundred thirty-six thousand, seven hundred forty".