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30252980 = 22510631423
BaseRepresentation
bin111001101100…
…1111110110100
32002221000021202
41303121332310
530221043410
63000232032
7515101052
oct163317664
962830252
1030252980
111609356a
12a16b618
136363194
1440371d2
1529c8ca5
hex1cd9fb4

30252980 has 24 divisors (see below), whose sum is σ = 63635712. Its totient is φ = 12081312.

The previous prime is 30252967. The next prime is 30252991. The reversal of 30252980 is 8925203.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20549 + ... + 21971.

It is an arithmetic number, because the mean of its divisors is an integer number (2651488).

Almost surely, 230252980 is an apocalyptic number.

It is an amenable number.

30252980 is an abundant number, since it is smaller than the sum of its proper divisors (33382732).

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

30252980 is a wasteful number, since it uses less digits than its factorization.

30252980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2495 (or 2493 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 30252980 is about 5500.2709024193. The cubic root of 30252980 is about 311.5942155109.

The spelling of 30252980 in words is "thirty million, two hundred fifty-two thousand, nine hundred eighty".

Divisors: 1 2 4 5 10 20 1063 1423 2126 2846 4252 5315 5692 7115 10630 14230 21260 28460 1512649 3025298 6050596 7563245 15126490 30252980