1308978 has 36 divisors (see below), whose sum is σ = 3122574. Its totient is φ = 396000.

The previous prime is 1308977. The next prime is 1309013. The reversal of 1308978 is 8798031.

It can be written as a sum of positive squares in only one way, i.e., 915849 + 393129 = 957^2 + 627^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1308977) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1878 + ... + 2478.

2^1308978 is an apocalyptic number.

1308978 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 1308978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1561287).

1308978 is an abundant number, since it is smaller than the sum of its proper divisors (1813596).

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

1308978 is a wasteful number, since it uses less digits than its factorization.

1308978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 631 (or 617 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 1308978 is about 1144.1057643417. The cubic root of 1308978 is about 109.3899563765.

The spelling of 1308978 in words is "one million, three hundred eight thousand, nine hundred seventy-eight".