13797840 has 160 divisors (see below), whose sum is σ = 50282496. Its totient is φ = 3064320.

The previous prime is 13797809. The next prime is 13797851. The reversal of 13797840 is 4879731.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 72145 + ... + 72335.

Almost surely, 2^13797840 is an apocalyptic number.

13797840 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 13797840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25141248).

13797840 is an abundant number, since it is smaller than the sum of its proper divisors (36484656).

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

13797840 is a wasteful number, since it uses less digits than its factorization.

13797840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257 (or 251 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 39.

The square root of 13797840 is about 3714.5443865971. The cubic root of 13797840 is about 239.8485155164.

The spelling of 13797840 in words is "thirteen million, seven hundred ninety-seven thousand, eight hundred forty".