198945706 has 8 divisors (see below), whose sum is σ = 298502820. Its totient is φ = 99444768.

The previous prime is 198945697. The next prime is 198945709. The reversal of 198945706 is 607549891.

It can be written as a sum of positive squares in 2 ways, for example, as 197824225 + 1121481 = 14065^2 + 1059^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 198945706.

It is not an unprimeable number, because it can be changed into a prime (198945709) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3651 + ... + 20278.

Almost surely, 2^198945706 is an apocalyptic number.

198945706 is a deficient number, since it is larger than the sum of its proper divisors (99557114).

198945706 is a wasteful number, since it uses less digits than its factorization.

198945706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28088.

The product of its (nonzero) digits is 544320, while the sum is 49.

The square root of 198945706 is about 14104.8114485802. The cubic root of 198945706 is about 583.7741452443.

It can be divided in two parts, 19894 and 5706, that added together give a square (25600 = 160²).

The spelling of 198945706 in words is "one hundred ninety-eight million, nine hundred forty-five thousand, seven hundred six".