4028055680 has 128 divisors (see below), whose sum is σ = 10844444160. Its totient is φ = 1417420800.

The previous prime is 4028055679. The next prime is 4028055683. The reversal of 4028055680 is 865508204.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×4028055680² = 32450465122360524800, which contains 22 as substring.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (4028055683) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 209012 + ... + 227468.

It is an arithmetic number, because the mean of its divisors is an integer number (84722220).

Almost surely, 2^4028055680 is an apocalyptic number.

4028055680 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4028055680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5422222080).

4028055680 is an abundant number, since it is smaller than the sum of its proper divisors (6816388480).

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

4028055680 is a wasteful number, since it uses less digits than its factorization.

4028055680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18518 (or 18506 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 38.

The square root of 4028055680 is about 63466.9652654040. The cubic root of 4028055680 is about 1591.1037100269.

The spelling of 4028055680 in words is "four billion, twenty-eight million, fifty-five thousand, six hundred eighty".