4128976520 has 32 divisors (see below), whose sum is σ = 9541287000. Its totient is φ = 1606952448.

The previous prime is 4128976493. The next prime is 4128976547. The reversal of 4128976520 is 256798214.

It is a happy number.

4128976520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (4128976493) and next prime (4128976547).

It can be written as a sum of positive squares in 4 ways, for example, as 3125480836 + 1003495684 = 55906^2 + 31678^2 .

It is a super-2 number, since 2×4128976520² = 34096894205422620800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1393445 + ... + 1396404.

Almost surely, 2^4128976520 is an apocalyptic number.

4128976520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4128976520 is an abundant number, since it is smaller than the sum of its proper divisors (5412310480).

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

4128976520 is a wasteful number, since it uses less digits than its factorization.

4128976520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2789897 (or 2789893 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 44.

The square root of 4128976520 is about 64257.1126024194. The cubic root of 4128976520 is about 1604.2823459287.

The spelling of 4128976520 in words is "four billion, one hundred twenty-eight million, nine hundred seventy-six thousand, five hundred twenty".