198751742 has 48 divisors (see below), whose sum is σ = 367759440. Its totient is φ = 80099712.

The previous prime is 198751741. The next prime is 198751747. The reversal of 198751742 is 247157891.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 198751693 and 198751702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198751741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 321818 + ... + 322434.

It is an arithmetic number, because the mean of its divisors is an integer number (7661655).

Almost surely, 2^198751742 is an apocalyptic number.

198751742 is a deficient number, since it is larger than the sum of its proper divisors (169007698).

198751742 is a wasteful number, since it uses less digits than its factorization.

198751742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 825 (or 818 counting only the distinct ones).

The product of its digits is 141120, while the sum is 44.

The square root of 198751742 is about 14097.9339621095. The cubic root of 198751742 is about 583.5843648446.

The spelling of 198751742 in words is "one hundred ninety-eight million, seven hundred fifty-one thousand, seven hundred forty-two".