12402040 has 32 divisors (see below), whose sum is σ = 31891680. Its totient is φ = 4252032.

The previous prime is 12402023. The next prime is 12402059. The reversal of 12402040 is 4020421.

It is a self number, because there is not a number n which added to its sum of digits gives 12402040.

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, 21867 + ... + 22426.

It is an arithmetic number, because the mean of its divisors is an integer number (996615).

Almost surely, 2^12402040 is an apocalyptic number.

12402040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12402040 is an abundant number, since it is smaller than the sum of its proper divisors (19489640).

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

12402040 is a wasteful number, since it uses less digits than its factorization.

12402040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44311 (or 44307 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 12402040 is about 3521.6530209548. The cubic root of 12402040 is about 231.4715976643.

Adding to 12402040 its reverse (4020421), we get a palindrome (16422461).

The spelling of 12402040 in words is "twelve million, four hundred two thousand, forty".