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30591028 = 22133592
BaseRepresentation
bin111010010110…
…0100000110100
32010120012000001
41310230200310
530312403103
63011401044
7521006446
oct164544064
963505001
1030591028
11162a4546
12a2b3184
136451000
1440c4496
152a4401d
hex1d2c834

30591028 has 36 divisors (see below), whose sum is σ = 58993060. Its totient is φ = 13879632.

The previous prime is 30591023. The next prime is 30591037. The reversal of 30591028 is 82019503.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 1127844 + 29463184 = 1062^2 + 5428^2 .

It is a junction number, because it is equal to n+sod(n) for n = 30590987 and 30591005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30591023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 518463 + ... + 518521.

Almost surely, 230591028 is an apocalyptic number.

It is an amenable number.

30591028 is a deficient number, since it is larger than the sum of its proper divisors (28402032).

30591028 is an equidigital number, since it uses as much as digits as its factorization.

30591028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161 (or 74 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 30591028 is about 5530.9156565618. The cubic root of 30591028 is about 312.7505080393.

The spelling of 30591028 in words is "thirty million, five hundred ninety-one thousand, twenty-eight".

Divisors: 1 2 4 13 26 52 59 118 169 236 338 676 767 1534 2197 3068 3481 4394 6962 8788 9971 13924 19942 39884 45253 90506 129623 181012 259246 518492 588289 1176578 2353156 7647757 15295514 30591028