30198987 has 80 divisors (see below), whose sum is σ = 59032512. Its totient is φ = 14929920.

The previous prime is 30198983. The next prime is 30198989. The reversal of 30198987 is 78989103.

It is not a de Polignac number, because 30198987 - 2² = 30198983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30198983) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 125187 + ... + 125427.

Almost surely, 2^30198987 is an apocalyptic number.

30198987 is a deficient number, since it is larger than the sum of its proper divisors (28833525).

30198987 is a wasteful number, since it uses less digits than its factorization.

30198987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290 (or 281 counting only the distinct ones).

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

The square root of 30198987 is about 5495.3604977290. The cubic root of 30198987 is about 311.4087359862.

The spelling of 30198987 in words is "thirty million, one hundred ninety-eight thousand, nine hundred eighty-seven".