13443740 has 24 divisors (see below), whose sum is σ = 28712880. Its totient is φ = 5285888.

The previous prime is 13443737. The next prime is 13443743. The reversal of 13443740 is 4734431.

It is an interprime number because it is at equal distance from previous prime (13443737) and next prime (13443743).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13443743) 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 7 ways as a sum of consecutive naturals, for example, 4517 + ... + 6876.

It is an arithmetic number, because the mean of its divisors is an integer number (1196370).

Almost surely, 2^13443740 is an apocalyptic number.

13443740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13443740 is an abundant number, since it is smaller than the sum of its proper divisors (15269140).

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

13443740 is a wasteful number, since it uses less digits than its factorization.

13443740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11461 (or 11459 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 26.

The square root of 13443740 is about 3666.5706048023. The cubic root of 13443740 is about 237.7789299026.

The spelling of 13443740 in words is "thirteen million, four hundred forty-three thousand, seven hundred forty".