1128978378 has 128 divisors (see below), whose sum is σ = 2831431680. Its totient is φ = 330480000.

The previous prime is 1128978359. The next prime is 1128978379. The reversal of 1128978378 is 8738798211.

It is a happy number.

1128978378 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (1128978379) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3677301 + ... + 3677607.

It is an arithmetic number, because the mean of its divisors is an integer number (22120560).

Almost surely, 2^1128978378 is an apocalyptic number.

1128978378 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 1128978378, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1415715840).

1128978378 is an abundant number, since it is smaller than the sum of its proper divisors (1702453302).

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

1128978378 is a wasteful number, since it uses less digits than its factorization.

1128978378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521 (or 515 counting only the distinct ones).

The product of its digits is 1354752, while the sum is 54.

The square root of 1128978378 is about 33600.2734810299. The cubic root of 1128978378 is about 1041.2664484181.

The spelling of 1128978378 in words is "one billion, one hundred twenty-eight million, nine hundred seventy-eight thousand, three hundred seventy-eight".