1098888 has 64 divisors (see below), whose sum is σ = 3256320. Its totient is φ = 302400.

The previous prime is 1098847. The next prime is 1098953. The reversal of 1098888 is 8888901.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5103 + ... + 5313.

It is an arithmetic number, because the mean of its divisors is an integer number (50880).

2^1098888 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1098888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1628160).

1098888 is an abundant number, since it is smaller than the sum of its proper divisors (2157432).

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

1098888 is a wasteful number, since it uses less digits than its factorization.

1098888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258 (or 254 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 42.

The square root of 1098888 is about 1048.2785889257. The cubic root of 1098888 is about 103.1932151059.

The spelling of 1098888 in words is "one million, ninety-eight thousand, eight hundred eighty-eight".