12618978 has 8 divisors (see below), whose sum is σ = 25237968. Its totient is φ = 4206324.

The previous prime is 12618967. The next prime is 12618989. The reversal of 12618978 is 87981621.

It is an interprime number because it is at equal distance from previous prime (12618967) and next prime (12618989).

It is a sphenic number, since it is the product of 3 distinct primes.

12618978 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1051576 + ... + 1051587.

It is an arithmetic number, because the mean of its divisors is an integer number (3154746).

Almost surely, 2^12618978 is an apocalyptic number.

12618978 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

12618978 is a wasteful number, since it uses less digits than its factorization.

12618978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2103168.

The product of its digits is 48384, while the sum is 42.

The square root of 12618978 is about 3552.3200869291. The cubic root of 12618978 is about 232.8134470451.

The spelling of 12618978 in words is "twelve million, six hundred eighteen thousand, nine hundred seventy-eight".