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22908980 = 2252574457
BaseRepresentation
bin101011101100…
…1000000110100
31121002220012202
41113121000310
521331041410
62135004032
7365503013
oct127310064
947086182
1022908980
1111a27946
127809618
134991513
143084a7a
152027ca5
hex15d9034

22908980 has 24 divisors (see below), whose sum is σ = 48306888. Its totient is φ = 9125888.

The previous prime is 22908971. The next prime is 22908983. The reversal of 22908980 is 8980922.

It can be written as a sum of positive squares in 4 ways, for example, as 10784656 + 12124324 = 3284^2 + 3482^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22908983) 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 7 ways as a sum of consecutive naturals, for example, 2912 + ... + 7368.

It is an arithmetic number, because the mean of its divisors is an integer number (2012787).

Almost surely, 222908980 is an apocalyptic number.

22908980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22908980 is an abundant number, since it is smaller than the sum of its proper divisors (25397908).

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

22908980 is a wasteful number, since it uses less digits than its factorization.

22908980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4723 (or 4721 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 22908980 is about 4786.3326252988. The cubic root of 22908980 is about 284.0110588830.

The spelling of 22908980 in words is "twenty-two million, nine hundred eight thousand, nine hundred eighty".

Divisors: 1 2 4 5 10 20 257 514 1028 1285 2570 4457 5140 8914 17828 22285 44570 89140 1145449 2290898 4581796 5727245 11454490 22908980