32401220 has 24 divisors (see below), whose sum is σ = 68171544. Its totient is φ = 12935936.

The previous prime is 32401217. The next prime is 32401241. The reversal of 32401220 is 2210423.

It can be written as a sum of positive squares in 4 ways, for example, as 3928324 + 28472896 = 1982^2 + 5336^2 .

It is a junction number, because it is equal to n+sod(n) for n = 32401195 and 32401204.

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, 12344 + ... + 14736.

It is an arithmetic number, because the mean of its divisors is an integer number (2840481).

Almost surely, 2^32401220 is an apocalyptic number.

It is an amenable number.

32401220 is an abundant number, since it is smaller than the sum of its proper divisors (35770324).

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

32401220 is a wasteful number, since it uses less digits than its factorization.

32401220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3079 (or 3077 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 32401220 is about 5692.2069533705. The cubic root of 32401220 is about 318.8015720732.

Adding to 32401220 its reverse (2210423), we get a palindrome (34611643).

The spelling of 32401220 in words is "thirty-two million, four hundred one thousand, two hundred twenty".