3448728 has 48 divisors (see below), whose sum is σ = 9835800. Its totient is φ = 1088640.

The previous prime is 3448721. The next prime is 3448751. The reversal of 3448728 is 8278443.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a d-powerful number, because it can be written as 3¹¹ + 4 + 4¹⁰ + 8 + 7⁶ + 2¹³ + 8⁷ .

It is a junction number, because it is equal to n+sod(n) for n = 3448692 and 3448701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3448721) 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, 108 + ... + 2628.

Almost surely, 2^3448728 is an apocalyptic number.

3448728 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3448728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4917900).

3448728 is an abundant number, since it is smaller than the sum of its proper divisors (6387072).

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

3448728 is a wasteful number, since it uses less digits than its factorization.

3448728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2552 (or 2545 counting only the distinct ones).

The product of its digits is 43008, while the sum is 36.

The square root of 3448728 is about 1857.0751196438. The cubic root of 3448728 is about 151.0844081677.

The spelling of 3448728 in words is "three million, four hundred forty-eight thousand, seven hundred twenty-eight".