3128650 has 36 divisors (see below), whose sum is σ = 6774678. Its totient is φ = 1071840.

The previous prime is 3128647. The next prime is 3128651. The reversal of 3128650 is 568213.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 2524921 + 603729 = 1589^2 + 777^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (3128651) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1812 + ... + 3088.

Almost surely, 2^3128650 is an apocalyptic number.

3128650 is an abundant number, since it is smaller than the sum of its proper divisors (3646028).

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

3128650 is a wasteful number, since it uses less digits than its factorization.

3128650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1303 (or 1291 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 3128650 is about 1768.7990275891. The cubic root of 3128650 is about 146.2577856425.

The spelling of 3128650 in words is "three million, one hundred twenty-eight thousand, six hundred fifty".