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30372559120 = 245379656989
BaseRepresentation
bin11100010010010110…
…000111100100010000
32220101201022212102001
4130102112013210100
5444200333342440
621541501203344
72123442331021
oct342226074420
986351285361
1030372559120
1111976577232
125a77860554
132b30619497
141681b08c48
15bcb6bbb9a
hex712587910

30372559120 has 20 divisors (see below), whose sum is σ = 70616200140. Its totient is φ = 12149023616.

The previous prime is 30372559099. The next prime is 30372559121. The reversal of 30372559120 is 2195527303.

It can be written as a sum of positive squares in 2 ways, for example, as 17178820624 + 13193738496 = 131068^2 + 114864^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 30372559120.

It is not an unprimeable number, because it can be changed into a prime (30372559121) 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, 189828415 + ... + 189828574.

It is an arithmetic number, because the mean of its divisors is an integer number (3530810007).

Almost surely, 230372559120 is an apocalyptic number.

It is an amenable number.

30372559120 is an abundant number, since it is smaller than the sum of its proper divisors (40243641020).

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

30372559120 is a wasteful number, since it uses less digits than its factorization.

30372559120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379657002 (or 379656996 counting only the distinct ones).

The product of its (nonzero) digits is 56700, while the sum is 37.

The spelling of 30372559120 in words is "thirty billion, three hundred seventy-two million, five hundred fifty-nine thousand, one hundred twenty".

Divisors: 1 2 4 5 8 10 16 20 40 80 379656989 759313978 1518627956 1898284945 3037255912 3796569890 6074511824 7593139780 15186279560 30372559120