13273640 has 16 divisors (see below), whose sum is σ = 29865780. Its totient is φ = 5309440.

The previous prime is 13273607. The next prime is 13273649. The reversal of 13273640 is 4637231.

It can be written as a sum of positive squares in 2 ways, for example, as 12348196 + 925444 = 3514^2 + 962^2 .

It is not an unprimeable number, because it can be changed into a prime (13273649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165881 + ... + 165960.

Almost surely, 2^13273640 is an apocalyptic number.

13273640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13273640 is an abundant number, since it is smaller than the sum of its proper divisors (16592140).

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

13273640 is a wasteful number, since it uses less digits than its factorization.

13273640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331852 (or 331848 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 26.

The square root of 13273640 is about 3643.3007012872. The cubic root of 13273640 is about 236.7718195251.

The spelling of 13273640 in words is "thirteen million, two hundred seventy-three thousand, six hundred forty".