13293840 has 160 divisors (see below), whose sum is σ = 48496896. Its totient is φ = 2949120.

The previous prime is 13293817. The next prime is 13293851. The reversal of 13293840 is 4839231.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 13293798 and 13293807.

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, 68784 + ... + 68976.

Almost surely, 2^13293840 is an apocalyptic number.

13293840 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 13293840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24248448).

13293840 is an abundant number, since it is smaller than the sum of its proper divisors (35203056).

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

13293840 is a wasteful number, since it uses less digits than its factorization.

13293840 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 5184, while the sum is 30.

The square root of 13293840 is about 3646.0718588640. The cubic root of 13293840 is about 236.8918661396.

The spelling of 13293840 in words is "thirteen million, two hundred ninety-three thousand, eight hundred forty".