198370540 has 24 divisors (see below), whose sum is σ = 416882592. Its totient is φ = 79290240.

The previous prime is 198370489. The next prime is 198370541. The reversal of 198370540 is 45073891.

It is a super-2 number, since 2×198370540² = 78701742279783200, which contains 22 as substring.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 198370540.

It is not an unprimeable number, because it can be changed into a prime (198370541) 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, 33912 + ... + 39328.

It is an arithmetic number, because the mean of its divisors is an integer number (17370108).

Almost surely, 2^198370540 is an apocalyptic number.

198370540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

198370540 is an abundant number, since it is smaller than the sum of its proper divisors (218512052).

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

198370540 is a wasteful number, since it uses less digits than its factorization.

198370540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7257 (or 7255 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 198370540 is about 14084.4076907764. The cubic root of 198370540 is about 583.2110248787.

The spelling of 198370540 in words is "one hundred ninety-eight million, three hundred seventy thousand, five hundred forty".