197400890 has 16 divisors (see below), whose sum is σ = 355490208. Its totient is φ = 78922896.

The previous prime is 197400877. The next prime is 197400911. The reversal of 197400890 is 98004791.

It is a super-2 number, since 2×197400890² = 77934222745584200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28949 + ... + 35111.

It is an arithmetic number, because the mean of its divisors is an integer number (22218138).

Almost surely, 2^197400890 is an apocalyptic number.

197400890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

197400890 is a deficient number, since it is larger than the sum of its proper divisors (158089318).

197400890 is a wasteful number, since it uses less digits than its factorization.

197400890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9373.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 197400890 is about 14049.9427045095. The cubic root of 197400890 is about 582.2592126793.

The spelling of 197400890 in words is "one hundred ninety-seven million, four hundred thousand, eight hundred ninety".