13940810 has 48 divisors (see below), whose sum is σ = 27788184. Its totient is φ = 5031936.

The previous prime is 13940809. The next prime is 13940827. The reversal of 13940810 is 1804931.

It can be written as a sum of positive squares in 12 ways, for example, as 1739761 + 12201049 = 1319^2 + 3493^2 .

It is a super-2 number, since 2×13940810² = 388692366912200, which contains 22 as substring.

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 13940810.

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 23 ways as a sum of consecutive naturals, for example, 123314 + ... + 123426.

Almost surely, 2^13940810 is an apocalyptic number.

13940810 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13940810 is a deficient number, since it is larger than the sum of its proper divisors (13847374).

13940810 is a wasteful number, since it uses less digits than its factorization.

13940810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219 (or 206 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 13940810 is about 3733.7394124390. The cubic root of 13940810 is about 240.6740887088.

The spelling of 13940810 in words is "thirteen million, nine hundred forty thousand, eight hundred ten".