2078778240 has 768 divisors, whose sum is σ = 9241689600. Its totient is φ = 418037760.

The previous prime is 2078778217. The next prime is 2078778259. The reversal of 2078778240 is 428778702.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

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 95 ways as a sum of consecutive naturals, for example, 19071306 + ... + 19071414.

It is an arithmetic number, because the mean of its divisors is an integer number (12033450).

Almost surely, 2^2078778240 is an apocalyptic number.

2078778240 is a gapful number since it is divisible by the number (20) 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 2078778240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4620844800).

2078778240 is an abundant number, since it is smaller than the sum of its proper divisors (7162911360).

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

2078778240 is a wasteful number, since it uses less digits than its factorization.

2078778240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195 (or 180 counting only the distinct ones).

The product of its (nonzero) digits is 351232, while the sum is 45.

The square root of 2078778240 is about 45593.6206063962. The cubic root of 2078778240 is about 1276.2508784984.

The spelling of 2078778240 in words is "two billion, seventy-eight million, seven hundred seventy-eight thousand, two hundred forty".