13269978 has 24 divisors (see below), whose sum is σ = 29454516. Its totient is φ = 4315200.

The previous prime is 13269973. The next prime is 13269983. The reversal of 13269978 is 87996231.

It is an interprime number because it is at equal distance from previous prime (13269973) and next prime (13269983).

It can be written as a sum of positive squares in 2 ways, for example, as 13198689 + 71289 = 3633^2 + 267^2 .

It is a super-2 number, since 2×13269978² = 352184632240968, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13269973) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8253 + ... + 9728.

Almost surely, 2^13269978 is an apocalyptic number.

13269978 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

13269978 is an abundant number, since it is smaller than the sum of its proper divisors (16184538).

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

13269978 is a wasteful number, since it uses less digits than its factorization.

13269978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18030 (or 18027 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 13269978 is about 3642.7981003619. The cubic root of 13269978 is about 236.7500435804.

The spelling of 13269978 in words is "thirteen million, two hundred sixty-nine thousand, nine hundred seventy-eight".