13440087 has 48 divisors (see below), whose sum is σ = 22014720. Its totient is φ = 8164800.

The previous prime is 13440083. The next prime is 13440101. The reversal of 13440087 is 78004431.

13440087 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13440087 - 2² = 13440083 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 13440087.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13440083) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 189262 + ... + 189332.

It is an arithmetic number, because the mean of its divisors is an integer number (458640).

Almost surely, 2^13440087 is an apocalyptic number.

13440087 is a deficient number, since it is larger than the sum of its proper divisors (8574633).

13440087 is an equidigital number, since it uses as much as digits as its factorization.

13440087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146 (or 134 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 13440087 is about 3666.0724215433. The cubic root of 13440087 is about 237.7573911265.

The spelling of 13440087 in words is "thirteen million, four hundred forty thousand, eighty-seven".