30428688 has 20 divisors (see below), whose sum is σ = 78607568. Its totient is φ = 10142880.

The previous prime is 30428687. The next prime is 30428729. The reversal of 30428688 is 88682403.

It is not an unprimeable number, because it can be changed into a prime (30428687) 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, 316918 + ... + 317013.

Almost surely, 2^30428688 is an apocalyptic number.

It is an amenable number.

30428688 is an abundant number, since it is smaller than the sum of its proper divisors (48178880).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30428688 is a wasteful number, since it uses less digits than its factorization.

30428688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 633942 (or 633936 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 39.

The square root of 30428688 is about 5516.2204451961. The cubic root of 30428688 is about 312.1962933081.

The spelling of 30428688 in words is "thirty million, four hundred twenty-eight thousand, six hundred eighty-eight".