30428973 has 8 divisors (see below), whose sum is σ = 45080000. Its totient is φ = 20285964.

The previous prime is 30428969. The next prime is 30428999. The reversal of 30428973 is 37982403.

30428973 is a `hidden beast` number, since 304 + 289 + 73 = 666.

It is not a de Polignac number, because 30428973 - 2² = 30428969 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 (30428873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 563473 + ... + 563526.

It is an arithmetic number, because the mean of its divisors is an integer number (5635000).

Almost surely, 2^30428973 is an apocalyptic number.

It is an amenable number.

30428973 is a deficient number, since it is larger than the sum of its proper divisors (14651027).

30428973 is a wasteful number, since it uses less digits than its factorization.

30428973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1127008 (or 1127002 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 30428973 is about 5516.2462780409. The cubic root of 30428973 is about 312.1972679987.

The spelling of 30428973 in words is "thirty million, four hundred twenty-eight thousand, nine hundred seventy-three".