13888457 has 4 divisors (see below), whose sum is σ = 15151056. Its totient is φ = 12625860.

The previous prime is 13888447. The next prime is 13888471. The reversal of 13888457 is 75488831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13888457 - 2⁶ = 13888393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13888447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 631283 + ... + 631304.

It is an arithmetic number, because the mean of its divisors is an integer number (3787764).

Almost surely, 2^13888457 is an apocalyptic number.

It is an amenable number.

13888457 is a deficient number, since it is larger than the sum of its proper divisors (1262599).

13888457 is a wasteful number, since it uses less digits than its factorization.

13888457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1262598.

The product of its digits is 215040, while the sum is 44.

The square root of 13888457 is about 3726.7220180743. The cubic root of 13888457 is about 240.3724367925.

The spelling of 13888457 in words is "thirteen million, eight hundred eighty-eight thousand, four hundred fifty-seven".