13820890 has 8 divisors (see below), whose sum is σ = 24877620. Its totient is φ = 5528352.

The previous prime is 13820887. The next prime is 13820897. The reversal of 13820890 is 9802831.

It can be written as a sum of positive squares in 2 ways, for example, as 13169641 + 651249 = 3629^2 + 807^2 .

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

It is not an unprimeable number, because it can be changed into a prime (13820897) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 691035 + ... + 691054.

Almost surely, 2^13820890 is an apocalyptic number.

13820890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13820890 is a deficient number, since it is larger than the sum of its proper divisors (11056730).

13820890 is a wasteful number, since it uses less digits than its factorization.

13820890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1382096.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 13820890 is about 3717.6457604242. The cubic root of 13820890 is about 239.9820009650.

The spelling of 13820890 in words is "thirteen million, eight hundred twenty thousand, eight hundred ninety".