3550720 has 80 divisors (see below), whose sum is σ = 9084240. Its totient is φ = 1327104.

The previous prime is 3550711. The next prime is 3550721. The reversal of 3550720 is 270553.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×3550720² = 25215225036800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3550691 and 3550700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3550721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48604 + ... + 48676.

It is an arithmetic number, because the mean of its divisors is an integer number (113553).

Almost surely, 2^3550720 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3550720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4542120).

3550720 is an abundant number, since it is smaller than the sum of its proper divisors (5533520).

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

3550720 is an equidigital number, since it uses as much as digits as its factorization.

3550720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115 (or 99 counting only the distinct ones).

The product of its (nonzero) digits is 1050, while the sum is 22.

The square root of 3550720 is about 1884.3354266160. The cubic root of 3550720 is about 152.5593426668.

The spelling of 3550720 in words is "three million, five hundred fifty thousand, seven hundred twenty".