13452840 has 48 divisors (see below), whose sum is σ = 43722900. Its totient is φ = 3587328.

The previous prime is 13452821. The next prime is 13452841. The reversal of 13452840 is 4825431.

13452840 is a `hidden beast` number, since 134 + 528 + 4 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 13351716 + 101124 = 3654^2 + 318^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13452841) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18325 + ... + 19044.

Almost surely, 2^13452840 is an apocalyptic number.

13452840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13452840 is an abundant number, since it is smaller than the sum of its proper divisors (30270060).

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

13452840 is a wasteful number, since it uses less digits than its factorization.

13452840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37386 (or 37379 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 13452840 is about 3667.8113364785. The cubic root of 13452840 is about 237.8325682559.

The spelling of 13452840 in words is "thirteen million, four hundred fifty-two thousand, eight hundred forty".