13640430 has 32 divisors (see below), whose sum is σ = 32897664. Its totient is φ = 3619616.

The previous prime is 13640401. The next prime is 13640437. The reversal of 13640430 is 3404631.

It is a super-2 number, since 2×13640430² = 372122661169800, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 13640397 and 13640406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13640437) 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 15 ways as a sum of consecutive naturals, for example, 5809 + ... + 7811.

It is an arithmetic number, because the mean of its divisors is an integer number (1028052).

Almost surely, 2^13640430 is an apocalyptic number.

13640430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13640430 is an abundant number, since it is smaller than the sum of its proper divisors (19257234).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13640430 is a wasteful number, since it uses less digits than its factorization.

13640430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2240.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 13640430 is about 3693.2952765789. The cubic root of 13640430 is about 238.9329363723.

The spelling of 13640430 in words is "thirteen million, six hundred forty thousand, four hundred thirty".