1198390 has 8 divisors (see below), whose sum is σ = 2157120. Its totient is φ = 479352.

The previous prime is 1198363. The next prime is 1198397. The reversal of 1198390 is 938911.

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

It is a super-2 number, since 2×1198390² = 2872277184200, which contains 22 as substring.

It is an Ulam number.

It is a plaindrome in base 8.

It is a zygodrome in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1198397) 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, 59910 + ... + 59929.

It is an arithmetic number, because the mean of its divisors is an integer number (269640).

2^1198390 is an apocalyptic number.

1198390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1198390 is a deficient number, since it is larger than the sum of its proper divisors (958730).

1198390 is a wasteful number, since it uses less digits than its factorization.

1198390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119846.

The product of its (nonzero) digits is 1944, while the sum is 31.

The square root of 1198390 is about 1094.7100072622. The cubic root of 1198390 is about 106.2183111957.

The spelling of 1198390 in words is "one million, one hundred ninety-eight thousand, three hundred ninety".