30156198 has 32 divisors (see below), whose sum is σ = 64955520. Its totient is φ = 9298560.

The previous prime is 30156179. The next prime is 30156199. The reversal of 30156198 is 89165103.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30156199) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3513 + ... + 8523.

It is an arithmetic number, because the mean of its divisors is an integer number (2029860).

Almost surely, 2^30156198 is an apocalyptic number.

30156198 is an abundant number, since it is smaller than the sum of its proper divisors (34799322).

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

30156198 is a wasteful number, since it uses less digits than its factorization.

30156198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5092.

The product of its (nonzero) digits is 6480, while the sum is 33.

The square root of 30156198 is about 5491.4659245050. The cubic root of 30156198 is about 311.2615879301.

The spelling of 30156198 in words is "thirty million, one hundred fifty-six thousand, one hundred ninety-eight".