1094889978 has 96 divisors (see below), whose sum is σ = 2926874496. Its totient is φ = 288054144.

The previous prime is 1094889973. The next prime is 1094889979. The reversal of 1094889978 is 8799884901.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1094889973) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1239525 + ... + 1240407.

It is an arithmetic number, because the mean of its divisors is an integer number (30488276).

Almost surely, 2^1094889978 is an apocalyptic number.

1094889978 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 1094889978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1463437248).

1094889978 is an abundant number, since it is smaller than the sum of its proper divisors (1831984518).

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

1094889978 is a wasteful number, since it uses less digits than its factorization.

1094889978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1668 (or 1665 counting only the distinct ones).

The product of its (nonzero) digits is 10450944, while the sum is 63.

The square root of 1094889978 is about 33089.1217471845. The cubic root of 1094889978 is about 1030.6791568203.

The spelling of 1094889978 in words is "one billion, ninety-four million, eight hundred eighty-nine thousand, nine hundred seventy-eight".