198515240 has 64 divisors (see below), whose sum is σ = 556882560. Its totient is φ = 61873920.

The previous prime is 198515203. The next prime is 198515243. The reversal of 198515240 is 42515891.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 198515240.

It is not an unprimeable number, because it can be changed into a prime (198515243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29147 + ... + 35306.

It is an arithmetic number, because the mean of its divisors is an integer number (8701290).

Almost surely, 2^198515240 is an apocalyptic number.

198515240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

198515240 is an abundant number, since it is smaller than the sum of its proper divisors (358367320).

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

198515240 is a wasteful number, since it uses less digits than its factorization.

198515240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64482 (or 64478 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 35.

The square root of 198515240 is about 14089.5436405868. The cubic root of 198515240 is about 583.3527968109.

The spelling of 198515240 in words is "one hundred ninety-eight million, five hundred fifteen thousand, two hundred forty".