12198040 has 32 divisors (see below), whose sum is σ = 27546480. Its totient is φ = 4861312.

The previous prime is 12198037. The next prime is 12198059. The reversal of 12198040 is 4089121.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 12197996 and 12198014.

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, 18354 + ... + 19006.

Almost surely, 2^12198040 is an apocalyptic number.

12198040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12198040 is an abundant number, since it is smaller than the sum of its proper divisors (15348440).

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

12198040 is a wasteful number, since it uses less digits than its factorization.

12198040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1131 (or 1127 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 12198040 is about 3492.5692548610. The cubic root of 12198040 is about 230.1954230707.

The spelling of 12198040 in words is "twelve million, one hundred ninety-eight thousand, forty".