13640090 has 8 divisors (see below), whose sum is σ = 24552180. Its totient is φ = 5456032.

The previous prime is 13640089. The next prime is 13640101. The reversal of 13640090 is 9004631.

It can be written as a sum of positive squares in 2 ways, for example, as 13402921 + 237169 = 3661^2 + 487^2 .

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

It is a super-3 number, since 3×13640090³ (a number of 22 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 681995 + ... + 682014.

Almost surely, 2^13640090 is an apocalyptic number.

13640090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13640090 is a deficient number, since it is larger than the sum of its proper divisors (10912090).

13640090 is a wasteful number, since it uses less digits than its factorization.

13640090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1364016.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 13640090 is about 3693.2492469369. The cubic root of 13640090 is about 238.9309511496.

The spelling of 13640090 in words is "thirteen million, six hundred forty thousand, ninety".