30975198 has 16 divisors (see below), whose sum is σ = 62075136. Its totient is φ = 10304280.

The previous prime is 30975193. The next prime is 30975223. The reversal of 30975198 is 89157903.

It is a happy number.

It is a super-2 number, since 2×30975198² = 1918925782278408, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30975193) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1798 + ... + 8073.

It is an arithmetic number, because the mean of its divisors is an integer number (3879696).

Almost surely, 2^30975198 is an apocalyptic number.

30975198 is an abundant number, since it is smaller than the sum of its proper divisors (31099938).

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

30975198 is a wasteful number, since it uses less digits than its factorization.

30975198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10399.

The product of its (nonzero) digits is 68040, while the sum is 42.

The square root of 30975198 is about 5565.5366318083. The cubic root of 30975198 is about 314.0542659805.

The spelling of 30975198 in words is "thirty million, nine hundred seventy-five thousand, one hundred ninety-eight".