275986780 has 48 divisors (see below), whose sum is σ = 611573760. Its totient is φ = 104328000.

The previous prime is 275986759. The next prime is 275986817. The reversal of 275986780 is 87689572.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 239205 + ... + 240355.

It is an arithmetic number, because the mean of its divisors is an integer number (12741120).

Almost surely, 2^275986780 is an apocalyptic number.

275986780 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 275986780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (305786880).

275986780 is an abundant number, since it is smaller than the sum of its proper divisors (335586980).

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

275986780 is a wasteful number, since it uses less digits than its factorization.

275986780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1810 (or 1808 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 52.

The square root of 275986780 is about 16612.8498458272. The cubic root of 275986780 is about 651.0726116759.

The spelling of 275986780 in words is "two hundred seventy-five million, nine hundred eighty-six thousand, seven hundred eighty".