3278628 has 36 divisors (see below), whose sum is σ = 8429148. Its totient is φ = 1074240.

The previous prime is 3278609. The next prime is 3278629. The reversal of 3278628 is 8268723.

It is a happy number.

3278628 is a `hidden beast` number, since 3 + 27 + 8 + 628 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1340964 + 1937664 = 1158^2 + 1392^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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 3¹³ + 2⁴ + 7² + 8³ + 6⁸ + 2⁴ + 8⁴ .

It is a junction number, because it is equal to n+sod(n) for n = 3278592 and 3278601.

It is not an unprimeable number, because it can be changed into a prime (3278629) 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, 1450 + ... + 2942.

It is an arithmetic number, because the mean of its divisors is an integer number (234143).

Almost surely, 2^3278628 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 3278628, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4214574).

3278628 is an abundant number, since it is smaller than the sum of its proper divisors (5150520).

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

3278628 is a wasteful number, since it uses less digits than its factorization.

3278628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1564 (or 1559 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 3278628 is about 1810.6982078745. The cubic root of 3278628 is about 148.5584574122.

It can be divided in two parts, 3 and 278628, that added together give a triangular number (278631 = T₇₄₆).

The spelling of 3278628 in words is "three million, two hundred seventy-eight thousand, six hundred twenty-eight".