1098538 has 8 divisors (see below), whose sum is σ = 1883232. Its totient is φ = 470796.

The previous prime is 1098533. The next prime is 1098541. The reversal of 1098538 is 8358901.

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

It is not an unprimeable number, because it can be changed into a prime (1098533) 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, 39220 + ... + 39247.

It is an arithmetic number, because the mean of its divisors is an integer number (235404).

2^1098538 is an apocalyptic number.

1098538 is a deficient number, since it is larger than the sum of its proper divisors (784694).

1098538 is an equidigital number, since it uses as much as digits as its factorization.

1098538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78476.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 1098538 is about 1048.1116352756. Note that the first 3 decimals coincide. The cubic root of 1098538 is about 103.1822581323.

The spelling of 1098538 in words is "one million, ninety-eight thousand, five hundred thirty-eight".