1098678 has 48 divisors (see below), whose sum is σ = 2651184. Its totient is φ = 302400.

The previous prime is 1098673. The next prime is 1098689. The reversal of 1098678 is 8768901.

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1098673) 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, 10828 + ... + 10928.

It is an arithmetic number, because the mean of its divisors is an integer number (55233).

2^1098678 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1098678, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1325592).

1098678 is an abundant number, since it is smaller than the sum of its proper divisors (1552506).

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

1098678 is a wasteful number, since it uses less digits than its factorization.

1098678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157 (or 150 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 39.

The square root of 1098678 is about 1048.1784199267. The cubic root of 1098678 is about 103.1866412009.

The spelling of 1098678 in words is "one million, ninety-eight thousand, six hundred seventy-eight".