13470728 has 8 divisors (see below), whose sum is σ = 25257630. Its totient is φ = 6735360.

The previous prime is 13470727. The next prime is 13470731. The reversal of 13470728 is 82707431.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 7409284 + 6061444 = 2722^2 + 2462^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-3 number, since 3×13470728³ (a number of 22 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13470694 and 13470703.

It is not an unprimeable number, because it can be changed into a prime (13470727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 841913 + ... + 841928.

Almost surely, 2^13470728 is an apocalyptic number.

It is an amenable number.

13470728 is a deficient number, since it is larger than the sum of its proper divisors (11786902).

13470728 is a wasteful number, since it uses less digits than its factorization.

13470728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1683847 (or 1683843 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 13470728 is about 3670.2490378720. The cubic root of 13470728 is about 237.9379354678.

The spelling of 13470728 in words is "thirteen million, four hundred seventy thousand, seven hundred twenty-eight".