13499940 has 48 divisors (see below), whose sum is σ = 38344320. Its totient is φ = 3548160.

The previous prime is 13499939. The next prime is 13499999. The reversal of 13499940 is 4999431.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

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, 2676 + ... + 5844.

It is an arithmetic number, because the mean of its divisors is an integer number (798840).

Almost surely, 2^13499940 is an apocalyptic number.

13499940 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 13499940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19172160).

13499940 is an abundant number, since it is smaller than the sum of its proper divisors (24844380).

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

13499940 is a wasteful number, since it uses less digits than its factorization.

13499940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3252 (or 3250 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 39.

The square root of 13499940 is about 3674.2264491999. The cubic root of 13499940 is about 238.1098050389.

The spelling of 13499940 in words is "thirteen million, four hundred ninety-nine thousand, nine hundred forty".