1098958 has 8 divisors (see below), whose sum is σ = 1883952. Its totient is φ = 470976.

The previous prime is 1098953. The next prime is 1098967. The reversal of 1098958 is 8598901.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1098958.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1098953) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39235 + ... + 39262.

It is an arithmetic number, because the mean of its divisors is an integer number (235494).

2^1098958 is an apocalyptic number.

1098958 is a deficient number, since it is larger than the sum of its proper divisors (784994).

1098958 is an equidigital number, since it uses as much as digits as its factorization.

1098958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78506.

The product of its (nonzero) digits is 25920, while the sum is 40.

The square root of 1098958 is about 1048.3119764650. The cubic root of 1098958 is about 103.1954062214.

The spelling of 1098958 in words is "one million, ninety-eight thousand, nine hundred fifty-eight".