13437890 has 8 divisors (see below), whose sum is σ = 24188220. Its totient is φ = 5375152.

The previous prime is 13437889. The next prime is 13437901. The reversal of 13437890 is 9873431.

It can be written as a sum of positive squares in 2 ways, for example, as 13402921 + 34969 = 3661^2 + 187^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 13437890.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 671885 + ... + 671904.

Almost surely, 2^13437890 is an apocalyptic number.

13437890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13437890 is a deficient number, since it is larger than the sum of its proper divisors (10750330).

13437890 is a wasteful number, since it uses less digits than its factorization.

13437890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1343796.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 13437890 is about 3665.7727698263. The cubic root of 13437890 is about 237.7444353211.

The spelling of 13437890 in words is "thirteen million, four hundred thirty-seven thousand, eight hundred ninety".