30628819 has 8 divisors (see below), whose sum is σ = 33687360. Its totient is φ = 27670656.

The previous prime is 30628813. The next prime is 30628823. The reversal of 30628819 is 91882603.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 30628819 - 2³ = 30628811 is a prime.

It is a super-2 number, since 2×30628819² = 1876249106669522, which contains 22 as substring.

It is a Duffinian number.

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

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24454 + ... + 25675.

It is an arithmetic number, because the mean of its divisors is an integer number (4210920).

Almost surely, 2^30628819 is an apocalyptic number.

30628819 is a deficient number, since it is larger than the sum of its proper divisors (3058541).

30628819 is a wasteful number, since it uses less digits than its factorization.

30628819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50189.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 30628819 is about 5534.3309442064. The cubic root of 30628819 is about 312.8792417627.

It can be divided in two parts, 3062 and 8819, that added together give a square (11881 = 109²).

The spelling of 30628819 in words is "thirty million, six hundred twenty-eight thousand, eight hundred nineteen".