4388777680 has 80 divisors (see below), whose sum is σ = 11693430144. Its totient is φ = 1500618240.

The previous prime is 4388777651. The next prime is 4388777711. The reversal of 4388777680 is 867778834.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×4388777680² = 38522739048932364800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 198375 + ... + 219385.

Almost surely, 2^4388777680 is an apocalyptic number.

4388777680 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 4388777680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5846715072).

4388777680 is an abundant number, since it is smaller than the sum of its proper divisors (7304652464).

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

4388777680 is a wasteful number, since it uses less digits than its factorization.

4388777680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21404 (or 21398 counting only the distinct ones).

The product of its (nonzero) digits is 12644352, while the sum is 58.

The square root of 4388777680 is about 66247.8503802199. The cubic root of 4388777680 is about 1637.2482209474.

The spelling of 4388777680 in words is "four billion, three hundred eighty-eight million, seven hundred seventy-seven thousand, six hundred eighty".