2078281840 has 40 divisors (see below), whose sum is σ = 5042096928. Its totient is φ = 795168000.

The previous prime is 2078281831. The next prime is 2078281859. The reversal of 2078281840 is 481828702.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 2078281793 and 2078281802.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 562911 + ... + 566590.

Almost surely, 2^2078281840 is an apocalyptic number.

2078281840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2078281840 is an abundant number, since it is smaller than the sum of its proper divisors (2963815088).

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

2078281840 is a wasteful number, since it uses less digits than its factorization.

2078281840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1129537 (or 1129531 counting only the distinct ones).

The product of its (nonzero) digits is 57344, while the sum is 40.

The square root of 2078281840 is about 45588.1765373435. The cubic root of 2078281840 is about 1276.1492833469.

The spelling of 2078281840 in words is "two billion, seventy-eight million, two hundred eighty-one thousand, eight hundred forty".