13903440 has 80 divisors (see below), whose sum is σ = 45384000. Its totient is φ = 3511296.

The previous prime is 13903429. The next prime is 13903451. The reversal of 13903440 is 4430931.

It is an interprime number because it is at equal distance from previous prime (13903429) and next prime (13903451).

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 13903440.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3036 + ... + 6084.

It is an arithmetic number, because the mean of its divisors is an integer number (567300).

Almost surely, 2^13903440 is an apocalyptic number.

13903440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13903440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22692000).

13903440 is an abundant number, since it is smaller than the sum of its proper divisors (31480560).

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

13903440 is a wasteful number, since it uses less digits than its factorization.

13903440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3084 (or 3078 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 13903440 is about 3728.7316878531. The cubic root of 13903440 is about 240.4588444207.

The spelling of 13903440 in words is "thirteen million, nine hundred three thousand, four hundred forty".