30628491 has 4 divisors (see below), whose sum is σ = 40837992. Its totient is φ = 20418992.

The previous prime is 30628471. The next prime is 30628519. The reversal of 30628491 is 19482603.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 30628491 - 2⁵ = 30628459 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30628421) 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, 5104746 + ... + 5104751.

It is an arithmetic number, because the mean of its divisors is an integer number (10209498).

Almost surely, 2^30628491 is an apocalyptic number.

30628491 is a deficient number, since it is larger than the sum of its proper divisors (10209501).

30628491 is a wasteful number, since it uses less digits than its factorization.

30628491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10209500.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 30628491 is about 5534.3013109154. The cubic root of 30628491 is about 312.8781248978.

The spelling of 30628491 in words is "thirty million, six hundred twenty-eight thousand, four hundred ninety-one".