12487440 has 80 divisors (see below), whose sum is σ = 44247168. Its totient is φ = 2853888.

The previous prime is 12487421. The next prime is 12487483. The reversal of 12487440 is 4478421.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 12487398 and 12487407.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2037 + ... + 5396.

Almost surely, 2^12487440 is an apocalyptic number.

12487440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12487440 is an abundant number, since it is smaller than the sum of its proper divisors (31759728).

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

12487440 is a wasteful number, since it uses less digits than its factorization.

12487440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7456 (or 7450 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 30.

The square root of 12487440 is about 3533.7572072795. The cubic root of 12487440 is about 232.0016844903.

The spelling of 12487440 in words is "twelve million, four hundred eighty-seven thousand, four hundred forty".