1128978 has 48 divisors (see below), whose sum is σ = 2673216. Its totient is φ = 356400.

The previous prime is 1128977. The next prime is 1128979. The reversal of 1128978 is 8798211.

It is an interprime number because it is at equal distance from previous prime (1128977) and next prime (1128979).

It is not an unprimeable number, because it can be changed into a prime (1128977) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11128 + ... + 11228.

It is an arithmetic number, because the mean of its divisors is an integer number (55692).

2^1128978 is an apocalyptic number.

1128978 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1128978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1336608).

1128978 is an abundant number, since it is smaller than the sum of its proper divisors (1544238).

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

1128978 is a wasteful number, since it uses less digits than its factorization.

1128978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141 (or 129 counting only the distinct ones).

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

The square root of 1128978 is about 1062.5337641694. The cubic root of 1128978 is about 104.1266332207.

The spelling of 1128978 in words is "one million, one hundred twenty-eight thousand, nine hundred seventy-eight".