1189278 has 12 divisors (see below), whose sum is σ = 2576808. Its totient is φ = 396420.

The previous prime is 1189277. The next prime is 1189301. The reversal of 1189278 is 8729811.

It is a super-2 number, since 2×1189278² = 2828764322568, which contains 22 as substring.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1189271) 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, 33018 + ... + 33053.

It is an arithmetic number, because the mean of its divisors is an integer number (214734).

2^1189278 is an apocalyptic number.

1189278 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1189278 is an abundant number, since it is smaller than the sum of its proper divisors (1387530).

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

1189278 is a wasteful number, since it uses less digits than its factorization.

1189278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66079 (or 66076 counting only the distinct ones).

The product of its digits is 8064, while the sum is 36.

The square root of 1189278 is about 1090.5402330955. The cubic root of 1189278 is about 105.9484144392.

The spelling of 1189278 in words is "one million, one hundred eighty-nine thousand, two hundred seventy-eight".