13898440 has 32 divisors (see below), whose sum is σ = 32633280. Its totient is φ = 5317312.

The previous prime is 13898429. The next prime is 13898449. The reversal of 13898440 is 4489831.

It is a self number, because there is not a number n which added to its sum of digits gives 13898440.

It is not an unprimeable number, because it can be changed into a prime (13898449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6634 + ... + 8473.

It is an arithmetic number, because the mean of its divisors is an integer number (1019790).

Almost surely, 2^13898440 is an apocalyptic number.

13898440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13898440 is an abundant number, since it is smaller than the sum of its proper divisors (18734840).

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

13898440 is a wasteful number, since it uses less digits than its factorization.

13898440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15141 (or 15137 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 13898440 is about 3728.0611582966. The cubic root of 13898440 is about 240.4300161025.

The spelling of 13898440 in words is "thirteen million, eight hundred ninety-eight thousand, four hundred forty".