1098884 has 18 divisors (see below), whose sum is σ = 2032254. Its totient is φ = 519840.

The previous prime is 1098847. The next prime is 1098953. The reversal of 1098884 is 4888901.

It can be written as a sum of positive squares in only one way, i.e., 577600 + 521284 = 760^2 + 722^2 .

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1064 + ... + 1824.

It is an arithmetic number, because the mean of its divisors is an integer number (112903).

2^1098884 is an apocalyptic number.

It is an amenable number.

1098884 is a deficient number, since it is larger than the sum of its proper divisors (933370).

1098884 is a wasteful number, since it uses less digits than its factorization.

1098884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 803 (or 782 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 38.

The square root of 1098884 is about 1048.2766810342. The cubic root of 1098884 is about 103.1930898965.

The spelling of 1098884 in words is "one million, ninety-eight thousand, eight hundred eighty-four".