198538415 has 16 divisors (see below), whose sum is σ = 256628736. Its totient is φ = 147021600.

The previous prime is 198538399. The next prime is 198538421. The reversal of 198538415 is 514835891.

It is not a de Polignac number, because 198538415 - 2⁴ = 198538399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24281 + ... + 31410.

It is an arithmetic number, because the mean of its divisors is an integer number (16039296).

Almost surely, 2^198538415 is an apocalyptic number.

198538415 is a deficient number, since it is larger than the sum of its proper divisors (58090321).

198538415 is a wasteful number, since it uses less digits than its factorization.

198538415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55750.

The product of its digits is 172800, while the sum is 44.

The square root of 198538415 is about 14090.3660349900. The cubic root of 198538415 is about 583.3754964535.

The spelling of 198538415 in words is "one hundred ninety-eight million, five hundred thirty-eight thousand, four hundred fifteen".