13907538 has 30 divisors (see below), whose sum is σ = 31269909. Its totient is φ = 4620024.

The previous prime is 13907521. The next prime is 13907549. The reversal of 13907538 is 83570931.

It can be written as a sum of positive squares in 2 ways, for example, as 10093329 + 3814209 = 3177^2 + 1953^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=2637.

It is a super-2 number, since 2×13907538² = 386839226442888, which contains 22 as substring.

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 14 ways as a sum of consecutive naturals, for example, 47320 + ... + 47612.

Almost surely, 2^13907538 is an apocalyptic number.

13907538 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 13907538

13907538 is an abundant number, since it is smaller than the sum of its proper divisors (17362371).

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

13907538 is an frugal number, since it uses more digits than its factorization.

13907538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600 (or 298 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 13907538 is about 3729.2811639779. The cubic root of 13907538 is about 240.4824669569.

The spelling of 13907538 in words is "thirteen million, nine hundred seven thousand, five hundred thirty-eight".