278603378740 has 48 divisors (see below), whose sum is σ = 631556714880. Its totient is φ = 102920343680.

The previous prime is 278603378723. The next prime is 278603378743. The reversal of 278603378740 is 47873306872.

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (278603378743) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10429066 + ... + 10455745.

It is an arithmetic number, because the mean of its divisors is an integer number (13157431560).

Almost surely, 2^278603378740 is an apocalyptic number.

278603378740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

278603378740 is an abundant number, since it is smaller than the sum of its proper divisors (352953336140).

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

278603378740 is a wasteful number, since it uses less digits than its factorization.

278603378740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20884872 (or 20884870 counting only the distinct ones).

The product of its (nonzero) digits is 9483264, while the sum is 55.

The spelling of 278603378740 in words is "two hundred seventy-eight billion, six hundred three million, three hundred seventy-eight thousand, seven hundred forty".