13387028 has 6 divisors (see below), whose sum is σ = 23427306. Its totient is φ = 6693512.

The previous prime is 13386991. The next prime is 13387043. The reversal of 13387028 is 82078331.

It can be written as a sum of positive squares in only one way, i.e., 9314704 + 4072324 = 3052^2 + 2018^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13386985 and 13387003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1673375 + ... + 1673382.

It is an arithmetic number, because the mean of its divisors is an integer number (3904551).

Almost surely, 2^13387028 is an apocalyptic number.

It is an amenable number.

13387028 is a deficient number, since it is larger than the sum of its proper divisors (10040278).

13387028 is a wasteful number, since it uses less digits than its factorization.

13387028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3346761 (or 3346759 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 13387028 is about 3658.8287743484. The cubic root of 13387028 is about 237.4441042975. Note that the first 3 decimals are identical.

The spelling of 13387028 in words is "thirteen million, three hundred eighty-seven thousand, twenty-eight".