12477640 has 32 divisors (see below), whose sum is σ = 32086080. Its totient is φ = 4277952.

The previous prime is 12477637. The next prime is 12477649. The reversal of 12477640 is 4677421.

12477640 is digitally balanced in base 2 and base 8, because in such bases it contains all the possibile digits an equal number of times.

12477640 is strictly pandigital in base 8.

It is not an unprimeable number, because it can be changed into a prime (12477649) 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, 22002 + ... + 22561.

It is an arithmetic number, because the mean of its divisors is an integer number (1002690).

Almost surely, 2^12477640 is an apocalyptic number.

12477640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12477640 is an abundant number, since it is smaller than the sum of its proper divisors (19608440).

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

12477640 is a wasteful number, since it uses less digits than its factorization.

12477640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44581 (or 44577 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 31.

The square root of 12477640 is about 3532.3703090135. The cubic root of 12477640 is about 231.9409778513.

The spelling of 12477640 in words is "twelve million, four hundred seventy-seven thousand, six hundred forty".