11287278 has 12 divisors (see below), whose sum is σ = 24455808. Its totient is φ = 3762420.

The previous prime is 11287271. The next prime is 11287279. The reversal of 11287278 is 87278211.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11287271) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 313518 + ... + 313553.

It is an arithmetic number, because the mean of its divisors is an integer number (2037984).

Almost surely, 2^11287278 is an apocalyptic number.

11287278 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

11287278 is an abundant number, since it is smaller than the sum of its proper divisors (13168530).

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

11287278 is a wasteful number, since it uses less digits than its factorization.

11287278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627079 (or 627076 counting only the distinct ones).

The product of its digits is 12544, while the sum is 36.

The square root of 11287278 is about 3359.6544465168. The cubic root of 11287278 is about 224.3174575118.

The spelling of 11287278 in words is "eleven million, two hundred eighty-seven thousand, two hundred seventy-eight".