199470618 has 12 divisors (see below), whose sum is σ = 432186378. Its totient is φ = 66490200.

The previous prime is 199470599. The next prime is 199470643. The reversal of 199470618 is 816074991.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 127848249 + 71622369 = 11307^2 + 8463^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5540833 + ... + 5540868.

Almost surely, 2^199470618 is an apocalyptic number.

199470618 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

199470618 is an abundant number, since it is smaller than the sum of its proper divisors (232715760).

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

199470618 is a wasteful number, since it uses less digits than its factorization.

199470618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11081709 (or 11081706 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 45.

The square root of 199470618 is about 14123.4067420010. The cubic root of 199470618 is about 584.2871176068.

The spelling of 199470618 in words is "one hundred ninety-nine million, four hundred seventy thousand, six hundred eighteen".