197684890 has 16 divisors (see below), whose sum is σ = 383204808. Its totient is φ = 72991296.

The previous prime is 197684887. The next prime is 197684897. The reversal of 197684890 is 98486791.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 160706329 + 36978561 = 12677^2 + 6081^2 .

It is not an unprimeable number, because it can be changed into a prime (197684897) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 760197 + ... + 760456.

Almost surely, 2^197684890 is an apocalyptic number.

197684890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

197684890 is a deficient number, since it is larger than the sum of its proper divisors (185519918).

197684890 is a wasteful number, since it uses less digits than its factorization.

197684890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1520673.

The product of its (nonzero) digits is 870912, while the sum is 52.

The square root of 197684890 is about 14060.0458747474. The cubic root of 197684890 is about 582.5383103368.

The spelling of 197684890 in words is "one hundred ninety-seven million, six hundred eighty-four thousand, eight hundred ninety".