30312628 has 12 divisors (see below), whose sum is σ = 53113732. Its totient is φ = 15137280.

The previous prime is 30312617. The next prime is 30312629. The reversal of 30312628 is 82621303.

It can be written as a sum of positive squares in 2 ways, for example, as 11546404 + 18766224 = 3398^2 + 4332^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30312629) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 813 + ... + 7828.

Almost surely, 2^30312628 is an apocalyptic number.

It is an amenable number.

30312628 is a deficient number, since it is larger than the sum of its proper divisors (22801104).

30312628 is a wasteful number, since it uses less digits than its factorization.

30312628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9522 (or 9520 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 30312628 is about 5505.6905107352. The cubic root of 30312628 is about 311.7988649942.

The spelling of 30312628 in words is "thirty million, three hundred twelve thousand, six hundred twenty-eight".