198915612 has 24 divisors (see below), whose sum is σ = 530441856. Its totient is φ = 56833008.

The previous prime is 198915599. The next prime is 198915631. The reversal of 198915612 is 216519891.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1183938 + ... + 1184105.

It is an arithmetic number, because the mean of its divisors is an integer number (22101744).

Almost surely, 2^198915612 is an apocalyptic number.

198915612 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

198915612 is an abundant number, since it is smaller than the sum of its proper divisors (331526244).

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

198915612 is a wasteful number, since it uses less digits than its factorization.

198915612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2368057 (or 2368055 counting only the distinct ones).

The product of its digits is 38880, while the sum is 42.

The square root of 198915612 is about 14103.7446091455. The cubic root of 198915612 is about 583.7447084273.

The spelling of 198915612 in words is "one hundred ninety-eight million, nine hundred fifteen thousand, six hundred twelve".