197426398 has 32 divisors (see below), whose sum is σ = 328950720. Its totient is φ = 88285440.

The previous prime is 197426387. The next prime is 197426429. The reversal of 197426398 is 893624791.

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 in 15 ways as a sum of consecutive naturals, for example, 177468 + ... + 178576.

It is an arithmetic number, because the mean of its divisors is an integer number (10279710).

Almost surely, 2^197426398 is an apocalyptic number.

197426398 is a deficient number, since it is larger than the sum of its proper divisors (131524322).

197426398 is a wasteful number, since it uses less digits than its factorization.

197426398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1332.

The product of its digits is 653184, while the sum is 49.

The square root of 197426398 is about 14050.8504368953. The cubic root of 197426398 is about 582.2842913036.

The spelling of 197426398 in words is "one hundred ninety-seven million, four hundred twenty-six thousand, three hundred ninety-eight".