13440477 has 8 divisors (see below), whose sum is σ = 17969440. Its totient is φ = 8935920.

The previous prime is 13440473. The next prime is 13440529. The reversal of 13440477 is 77404431.

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

It is not a de Polignac number, because 13440477 - 2² = 13440473 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13440473) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4774 + ... + 7047.

It is an arithmetic number, because the mean of its divisors is an integer number (2246180).

Almost surely, 2^13440477 is an apocalyptic number.

It is an amenable number.

13440477 is a deficient number, since it is larger than the sum of its proper divisors (4528963).

13440477 is a wasteful number, since it uses less digits than its factorization.

13440477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12203.

The product of its (nonzero) digits is 9408, while the sum is 30.

The square root of 13440477 is about 3666.1256115960. The cubic root of 13440477 is about 237.7596908260.

The spelling of 13440477 in words is "thirteen million, four hundred forty thousand, four hundred seventy-seven".