197720444 has 6 divisors (see below), whose sum is σ = 346010784. Its totient is φ = 98860220.

The previous prime is 197720437. The next prime is 197720461. The reversal of 197720444 is 444027791.

It is a junction number, because it is equal to n+sod(n) for n = 197720398 and 197720407.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24715052 + ... + 24715059.

It is an arithmetic number, because the mean of its divisors is an integer number (57668464).

Almost surely, 2^197720444 is an apocalyptic number.

It is an amenable number.

197720444 is a deficient number, since it is larger than the sum of its proper divisors (148290340).

197720444 is a wasteful number, since it uses less digits than its factorization.

197720444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49430115 (or 49430113 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 38.

The square root of 197720444 is about 14061.3101807762. The cubic root of 197720444 is about 582.5732317810.

The spelling of 197720444 in words is "one hundred ninety-seven million, seven hundred twenty thousand, four hundred forty-four".