198426940 has 24 divisors (see below), whose sum is σ = 426389040. Its totient is φ = 77524608.

The previous prime is 198426931. The next prime is 198426947. The reversal of 198426940 is 49624891.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198426947) 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, 114505 + ... + 116224.

It is an arithmetic number, because the mean of its divisors is an integer number (17766210).

Almost surely, 2^198426940 is an apocalyptic number.

198426940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

198426940 is an abundant number, since it is smaller than the sum of its proper divisors (227962100).

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

198426940 is a wasteful number, since it uses less digits than its factorization.

198426940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230781 (or 230779 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 43.

The square root of 198426940 is about 14086.4097626045. The cubic root of 198426940 is about 583.2662917965.

The spelling of 198426940 in words is "one hundred ninety-eight million, four hundred twenty-six thousand, nine hundred forty".