13220004 has 36 divisors (see below), whose sum is σ = 35884464. Its totient is φ = 3776976.

The previous prime is 13220003. The next prime is 13220021. The reversal of 13220004 is 40002231.

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

It is not an unprimeable number, because it can be changed into a prime (13220003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10654 + ... + 11829.

Almost surely, 2^13220004 is an apocalyptic number.

13220004 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

13220004 is an abundant number, since it is smaller than the sum of its proper divisors (22664460).

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

13220004 is a wasteful number, since it uses less digits than its factorization.

13220004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22504 (or 22495 counting only the distinct ones).

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

The square root of 13220004 is about 3635.9323426049. The cubic root of 13220004 is about 236.4524738860.

Adding to 13220004 its reverse (40002231), we get a palindrome (53222235).

The spelling of 13220004 in words is "thirteen million, two hundred twenty thousand, four".