12976578 has 32 divisors (see below), whose sum is σ = 29332800. Its totient is φ = 4251168.

The previous prime is 12976567. The next prime is 12976643. The reversal of 12976578 is 87567921.

12976578 is a `hidden beast` number, since 1 + 2 + 9 + 76 + 578 = 666.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1150 + ... + 5222.

It is an arithmetic number, because the mean of its divisors is an integer number (916650).

Almost surely, 2^12976578 is an apocalyptic number.

12976578 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12976578, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14666400).

12976578 is an abundant number, since it is smaller than the sum of its proper divisors (16356222).

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

12976578 is a wasteful number, since it uses less digits than its factorization.

12976578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4143 (or 4137 counting only the distinct ones).

The product of its digits is 211680, while the sum is 45.

The square root of 12976578 is about 3602.3017641502. The cubic root of 12976578 is about 234.9921711591.

It can be divided in two parts, 1297 and 6578, that added together give a triangular number (7875 = T₁₂₅).

The spelling of 12976578 in words is "twelve million, nine hundred seventy-six thousand, five hundred seventy-eight".