198726536 has 8 divisors (see below), whose sum is σ = 372612270. Its totient is φ = 99363264.

The previous prime is 198726487. The next prime is 198726547. The reversal of 198726536 is 635627891.

It can be written as a sum of positive squares in only one way, i.e., 176730436 + 21996100 = 13294^2 + 4690^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×198726536² = 78984472221118592, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12420401 + ... + 12420416.

Almost surely, 2^198726536 is an apocalyptic number.

It is an amenable number.

198726536 is a deficient number, since it is larger than the sum of its proper divisors (173885734).

198726536 is a wasteful number, since it uses less digits than its factorization.

198726536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24840823 (or 24840819 counting only the distinct ones).

The product of its digits is 544320, while the sum is 47.

The square root of 198726536 is about 14097.0399729872. The cubic root of 198726536 is about 583.5596934476.

The spelling of 198726536 in words is "one hundred ninety-eight million, seven hundred twenty-six thousand, five hundred thirty-six".