4128887640 has 32 divisors (see below), whose sum is σ = 12386663280. Its totient is φ = 1101036672.

The previous prime is 4128887599. The next prime is 4128887641. The reversal of 4128887640 is 467888214.

It is a self number, because there is not a number n which added to its sum of digits gives 4128887640.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4128887641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17203579 + ... + 17203818.

Almost surely, 2^4128887640 is an apocalyptic number.

4128887640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4128887640 is an abundant number, since it is smaller than the sum of its proper divisors (8257775640).

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

4128887640 is a wasteful number, since it uses less digits than its factorization.

4128887640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34407411 (or 34407407 counting only the distinct ones).

The product of its (nonzero) digits is 688128, while the sum is 48.

The square root of 4128887640 is about 64256.4210021069. The cubic root of 4128887640 is about 1604.2708346306.

The spelling of 4128887640 in words is "four billion, one hundred twenty-eight million, eight hundred eighty-seven thousand, six hundred forty".