275561286 has 192 divisors, whose sum is σ = 770778624. Its totient is φ = 63866880.

The previous prime is 275561281. The next prime is 275561291. The reversal of 275561286 is 682165572.

275561286 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (275561281) and next prime (275561291).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (275561281) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2840790 + ... + 2840886.

It is an arithmetic number, because the mean of its divisors is an integer number (4014472).

Almost surely, 2^275561286 is an apocalyptic number.

275561286 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 275561286, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (385389312).

275561286 is an abundant number, since it is smaller than the sum of its proper divisors (495217338).

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

275561286 is a wasteful number, since it uses less digits than its factorization.

275561286 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187 (or 176 counting only the distinct ones).

The product of its digits is 201600, while the sum is 42.

The square root of 275561286 is about 16600.0387348946. The cubic root of 275561286 is about 650.7378492909.

The spelling of 275561286 in words is "two hundred seventy-five million, five hundred sixty-one thousand, two hundred eighty-six".