13143870 has 64 divisors (see below), whose sum is σ = 35542080. Its totient is φ = 3499200.

The previous prime is 13143847. The next prime is 13143881. The reversal of 13143870 is 7834131.

It is a super-2 number, since 2×13143870² = 345522637153800, which contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21570 + ... + 22170.

It is an arithmetic number, because the mean of its divisors is an integer number (555345).

Almost surely, 2^13143870 is an apocalyptic number.

13143870 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 13143870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17771040).

13143870 is an abundant number, since it is smaller than the sum of its proper divisors (22398210).

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

13143870 is an frugal number, since it uses more digits than its factorization.

13143870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 629 (or 611 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 13143870 is about 3625.4475585781. The cubic root of 13143870 is about 235.9976898175.

It can be divided in two parts, 1314 and 3870, that added together give a square (5184 = 72²).

The spelling of 13143870 in words is "thirteen million, one hundred forty-three thousand, eight hundred seventy".