4278380640 has 48 divisors (see below), whose sum is σ = 13476900528. Its totient is φ = 1140901376.

The previous prime is 4278380629. The next prime is 4278380653. The reversal of 4278380640 is 460838724.

It is a tau number, because it is divible by the number of its divisors (48).

It is a junction number, because it is equal to n+sod(n) for n = 4278380592 and 4278380601.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4456167 + ... + 4457126.

It is an arithmetic number, because the mean of its divisors is an integer number (280768761).

Almost surely, 2^4278380640 is an apocalyptic number.

4278380640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4278380640 is an abundant number, since it is smaller than the sum of its proper divisors (9198519888).

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

4278380640 is a wasteful number, since it uses less digits than its factorization.

4278380640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8913311 (or 8913303 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 42.

The square root of 4278380640 is about 65409.3314443742. The cubic root of 4278380640 is about 1623.4034831839.

The spelling of 4278380640 in words is "four billion, two hundred seventy-eight million, three hundred eighty thousand, six hundred forty".