197399040 has 80 divisors (see below), whose sum is σ = 631084608. Its totient is φ = 52637696.

The previous prime is 197399039. The next prime is 197399077. The reversal of 197399040 is 40993791.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 197398983 and 197399001.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5172 + ... + 20531.

Almost surely, 2^197399040 is an apocalyptic number.

197399040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

197399040 is an abundant number, since it is smaller than the sum of its proper divisors (433685568).

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

197399040 is an equidigital number, since it uses as much as digits as its factorization.

197399040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25729 (or 25713 counting only the distinct ones).

The product of its (nonzero) digits is 61236, while the sum is 42.

The square root of 197399040 is about 14049.8768677878. The cubic root of 197399040 is about 582.2573937363.

The spelling of 197399040 in words is "one hundred ninety-seven million, three hundred ninety-nine thousand, forty".