30428861 has 8 divisors (see below), whose sum is σ = 33914880. Its totient is φ = 27131328.

The previous prime is 30428857. The next prime is 30428869. The reversal of 30428861 is 16882403.

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

It is a cyclic number.

It is not a de Polignac number, because 30428861 - 2² = 30428857 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30428869) 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, 46781 + ... + 47426.

It is an arithmetic number, because the mean of its divisors is an integer number (4239360).

Almost surely, 2^30428861 is an apocalyptic number.

It is an amenable number.

30428861 is a deficient number, since it is larger than the sum of its proper divisors (3486019).

30428861 is a wasteful number, since it uses less digits than its factorization.

30428861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94243.

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 30428861 is about 5516.2361262005. The cubic root of 30428861 is about 312.1968849631.

The spelling of 30428861 in words is "thirty million, four hundred twenty-eight thousand, eight hundred sixty-one".