30775198 has 4 divisors (see below), whose sum is σ = 46162800. Its totient is φ = 15387598.

The previous prime is 30775189. The next prime is 30775243. The reversal of 30775198 is 89157703.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×30775198² = 1894225623878408, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 30775198.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7693798 + ... + 7693801.

It is an arithmetic number, because the mean of its divisors is an integer number (11540700).

Almost surely, 2^30775198 is an apocalyptic number.

30775198 is a deficient number, since it is larger than the sum of its proper divisors (15387602).

30775198 is a wasteful number, since it uses less digits than its factorization.

30775198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15387601.

The product of its (nonzero) digits is 52920, while the sum is 40.

The square root of 30775198 is about 5547.5398150892. The cubic root of 30775198 is about 313.3768796678.

The spelling of 30775198 in words is "thirty million, seven hundred seventy-five thousand, one hundred ninety-eight".