30628851 has 12 divisors (see below), whose sum is σ = 44889096. Its totient is φ = 18562720.

The previous prime is 30628831. The next prime is 30628867. The reversal of 30628851 is 15882603.

It is a happy number.

It is not a de Polignac number, because 30628851 - 2⁷ = 30628723 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (30628811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41826 + ... + 42551.

It is an arithmetic number, because the mean of its divisors is an integer number (3740758).

Almost surely, 2^30628851 is an apocalyptic number.

30628851 is a deficient number, since it is larger than the sum of its proper divisors (14260245).

30628851 is a wasteful number, since it uses less digits than its factorization.

30628851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84402 (or 84391 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 30628851 is about 5534.3338352506. Note that the first 3 decimals coincide. The cubic root of 30628851 is about 312.8793507247.

It can be divided in two parts, 30 and 628851, that added together give a triangular number (628881 = T₁₁₂₁).

The spelling of 30628851 in words is "thirty million, six hundred twenty-eight thousand, eight hundred fifty-one".