13276440 has 128 divisors (see below), whose sum is σ = 46656000. Its totient is φ = 3348864.

The previous prime is 13276433. The next prime is 13276469. The reversal of 13276440 is 4467231.

13276440 is a `hidden beast` number, since 13 + 2 + 7 + 644 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 20197 + ... + 20843.

It is an arithmetic number, because the mean of its divisors is an integer number (364500).

Almost surely, 2^13276440 is an apocalyptic number.

13276440 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 13276440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23328000).

13276440 is an abundant number, since it is smaller than the sum of its proper divisors (33379560).

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

13276440 is a wasteful number, since it uses less digits than its factorization.

13276440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 686 (or 676 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 13276440 is about 3643.6849479613. The cubic root of 13276440 is about 236.7884669176.

The spelling of 13276440 in words is "thirteen million, two hundred seventy-six thousand, four hundred forty".