13449640 has 64 divisors (see below), whose sum is σ = 31752000. Its totient is φ = 5122560.

The previous prime is 13449617. The next prime is 13449677. The reversal of 13449640 is 4694431.

13449640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×13449640² = 361785632259200, which contains 22 as substring.

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, 96691 + ... + 96829.

It is an arithmetic number, because the mean of its divisors is an integer number (496125).

Almost surely, 2^13449640 is an apocalyptic number.

13449640 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 13449640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15876000).

13449640 is an abundant number, since it is smaller than the sum of its proper divisors (18302360).

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

13449640 is a wasteful number, since it uses less digits than its factorization.

13449640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250 (or 246 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 13449640 is about 3667.3750830805. The cubic root of 13449640 is about 237.8137091755.

The spelling of 13449640 in words is "thirteen million, four hundred forty-nine thousand, six hundred forty".