13840690 has 8 divisors (see below), whose sum is σ = 24913260. Its totient is φ = 5536272.

The previous prime is 13840661. The next prime is 13840693. The reversal of 13840690 is 9604831.

It can be written as a sum of positive squares in 2 ways, for example, as 13771521 + 69169 = 3711^2 + 263^2 .

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

It is a super-2 number, since 2×13840690² = 383129399352200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13840693) by changing a digit.

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, 692025 + ... + 692044.

Almost surely, 2^13840690 is an apocalyptic number.

13840690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13840690 is a deficient number, since it is larger than the sum of its proper divisors (11072570).

13840690 is a wasteful number, since it uses less digits than its factorization.

13840690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1384076.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 13840690 is about 3720.3077829664. The cubic root of 13840690 is about 240.0965468043.

The spelling of 13840690 in words is "thirteen million, eight hundred forty thousand, six hundred ninety".