1779081408 has 140 divisors (see below), whose sum is σ = 5679643200. Its totient is φ = 547388928.

The previous prime is 1779081391. The next prime is 1779081443. The reversal of 1779081408 is 8041809771.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 54193 + ... + 80591.

It is an arithmetic number, because the mean of its divisors is an integer number (40568880).

Almost surely, 2^1779081408 is an apocalyptic number.

1779081408 is a gapful number since it is divisible by the number (18) 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 1779081408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2839821600).

1779081408 is an abundant number, since it is smaller than the sum of its proper divisors (3900561792).

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

1779081408 is a wasteful number, since it uses less digits than its factorization.

1779081408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26436 (or 26417 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 45.

The square root of 1779081408 is about 42179.1584553319. The cubic root of 1779081408 is about 1211.7097628720.

The spelling of 1779081408 in words is "one billion, seven hundred seventy-nine million, eighty-one thousand, four hundred eight".