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30216805380 = 22345172233277
BaseRepresentation
bin11100001001000011…
…111101110000000100
32212222212020202110000
4130021003331300010
5443341000233010
621514215001300
72116541415336
oct341103756004
985885222400
1030216805380
11118a6665133
125a33669230
132b072846c8
141669163456
15bbcba27c0
hex7090fdc04

30216805380 has 360 divisors, whose sum is σ = 101492439048. Its totient is φ = 7524016128.

The previous prime is 30216805349. The next prime is 30216805441. The reversal of 30216805380 is 8350861203.

30216805380 is a `hidden beast` number, since 30 + 2 + 16 + 80 + 538 + 0 = 666.

It can be written as a sum of positive squares in 12 ways, for example, as 7093345284 + 23123460096 = 84222^2 + 152064^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 109085802 + ... + 109086078.

Almost surely, 230216805380 is an apocalyptic number.

30216805380 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30216805380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50746219524).

30216805380 is an abundant number, since it is smaller than the sum of its proper divisors (71275633668).

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

30216805380 is a wasteful number, since it uses less digits than its factorization.

30216805380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 565 (or 537 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The spelling of 30216805380 in words is "thirty billion, two hundred sixteen million, eight hundred five thousand, three hundred eighty".