12190840 has 16 divisors (see below), whose sum is σ = 27429480. Its totient is φ = 4876320.

The previous prime is 12190777. The next prime is 12190847. The reversal of 12190840 is 4809121.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12190847) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152346 + ... + 152425.

Almost surely, 2^12190840 is an apocalyptic number.

12190840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12190840 is an abundant number, since it is smaller than the sum of its proper divisors (15238640).

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

12190840 is a wasteful number, since it uses less digits than its factorization.

12190840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304782 (or 304778 counting only the distinct ones).

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

The square root of 12190840 is about 3491.5383429085. The cubic root of 12190840 is about 230.1501225346.

Adding to 12190840 its reverse (4809121), we get a palindrome (16999961).

The spelling of 12190840 in words is "twelve million, one hundred ninety thousand, eight hundred forty".