13020240 has 40 divisors (see below), whose sum is σ = 40363488. Its totient is φ = 3472000.

The previous prime is 13020233. The next prime is 13020251. The reversal of 13020240 is 4202031.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26886 + ... + 27365.

Almost surely, 2^13020240 is an apocalyptic number.

13020240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13020240 is an abundant number, since it is smaller than the sum of its proper divisors (27343248).

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

13020240 is a wasteful number, since it uses less digits than its factorization.

13020240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54267 (or 54261 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 13020240 is about 3608.3569668202. The cubic root of 13020240 is about 235.2554337385.

Adding to 13020240 its reverse (4202031), we get a palindrome (17222271).

The spelling of 13020240 in words is "thirteen million, twenty thousand, two hundred forty".