13216770 has 168 divisors, whose sum is σ = 42613884. Its totient is φ = 2939328.

The previous prime is 13216751. The next prime is 13216783. The reversal of 13216770 is 7761231.

It can be written as a sum of positive squares in 2 ways, for example, as 12895281 + 321489 = 3591^2 + 567^2 .

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 83 ways as a sum of consecutive naturals, for example, 357192 + ... + 357228.

Almost surely, 2^13216770 is an apocalyptic number.

13216770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 13216770, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21306942).

13216770 is an abundant number, since it is smaller than the sum of its proper divisors (29397114).

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

13216770 is an equidigital number, since it uses as much as digits as its factorization.

13216770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76 (or 54 counting only the distinct ones).

The product of its (nonzero) digits is 1764, while the sum is 27.

The square root of 13216770 is about 3635.4875876559. The cubic root of 13216770 is about 236.4331912478.

The spelling of 13216770 in words is "thirteen million, two hundred sixteen thousand, seven hundred seventy".