13857432 has 32 divisors (see below), whose sum is σ = 34836480. Its totient is φ = 4593440.

The previous prime is 13857427. The next prime is 13857457. The reversal of 13857432 is 23475831.

13857432 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 13857393 and 13857402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3073 + ... + 6095.

It is an arithmetic number, because the mean of its divisors is an integer number (1088640).

Almost surely, 2^13857432 is an apocalyptic number.

13857432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13857432 is an abundant number, since it is smaller than the sum of its proper divisors (20979048).

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

13857432 is a wasteful number, since it uses less digits than its factorization.

13857432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3223 (or 3219 counting only the distinct ones).

The product of its digits is 20160, while the sum is 33.

The square root of 13857432 is about 3722.5571855916. The cubic root of 13857432 is about 240.1933164668.

The spelling of 13857432 in words is "thirteen million, eight hundred fifty-seven thousand, four hundred thirty-two".