13903438 has 16 divisors (see below), whose sum is σ = 21855744. Its totient is φ = 6625080.

The previous prime is 13903429. The next prime is 13903451. The reversal of 13903438 is 83430931.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is an unprimeable number.

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, 2481 + ... + 5827.

It is an arithmetic number, because the mean of its divisors is an integer number (1365984).

Almost surely, 2^13903438 is an apocalyptic number.

13903438 is a deficient number, since it is larger than the sum of its proper divisors (7952306).

13903438 is a wasteful number, since it uses less digits than its factorization.

13903438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3447.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 13903438 is about 3728.7314196654. The cubic root of 13903438 is about 240.4588328907.

It can be divided in two parts, 13903 and 438, that added together give a palindrome (14341).

The spelling of 13903438 in words is "thirteen million, nine hundred three thousand, four hundred thirty-eight".