3028720 has 60 divisors (see below), whose sum is σ = 7537464. Its totient is φ = 1131520.

The previous prime is 3028699. The next prime is 3028721. The reversal of 3028720 is 278203.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 3028691 and 3028700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3028721) 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, 23055 + ... + 23185.

Almost surely, 2^3028720 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 3028720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3768732).

3028720 is an abundant number, since it is smaller than the sum of its proper divisors (4508744).

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

3028720 is a wasteful number, since it uses less digits than its factorization.

3028720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178 (or 155 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 3028720 is about 1740.3218093215. The cubic root of 3028720 is about 144.6837339851.

The spelling of 3028720 in words is "three million, twenty-eight thousand, seven hundred twenty".