13909434 has 144 divisors (see below), whose sum is σ = 39299904. Its totient is φ = 3252480.

The previous prime is 13909433. The next prime is 13909439. The reversal of 13909434 is 43490931.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 13909395 and 13909404.

It is not an unprimeable number, because it can be changed into a prime (13909433) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 604747 + ... + 604769.

It is an arithmetic number, because the mean of its divisors is an integer number (272916).

Almost surely, 2^13909434 is an apocalyptic number.

13909434 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 13909434, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19649952).

13909434 is an abundant number, since it is smaller than the sum of its proper divisors (25390470).

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

13909434 is a wasteful number, since it uses less digits than its factorization.

13909434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81 (or 63 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 33.

The square root of 13909434 is about 3729.5353598002. The cubic root of 13909434 is about 240.4933947008.

It can be divided in two parts, 139094 and 34, that added together give a triangular number (139128 = T₅₂₇).

The spelling of 13909434 in words is "thirteen million, nine hundred nine thousand, four hundred thirty-four".