197490 has 32 divisors (see below), whose sum is σ = 492480. Its totient is φ = 50624.

The previous prime is 197479. The next prime is 197507. The reversal of 197490 is 94791.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 197490.

It is an unprimeable number.

197490 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 757 + ... + 983.

It is an arithmetic number, because the mean of its divisors is an integer number (15390).

2¹⁹⁷⁴⁹⁰ is an apocalyptic number.

197490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 197490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (246240).

197490 is an abundant number, since it is smaller than the sum of its proper divisors (294990).

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

197490 is a wasteful number, since it uses less digits than its factorization.

197490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266.

The product of its (nonzero) digits is 2268, while the sum is 30.

The square root of 197490 is about 444.3984698444. The cubic root of 197490 is about 58.2346813286.

The spelling of 197490 in words is "one hundred ninety-seven thousand, four hundred ninety".