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487887880 = 23529420593
BaseRepresentation
bin11101000101001…
…001010000001000
31021000001021100111
4131011021100020
51444344403010
6120225044104
715042656434
oct3505112010
91230037314
10487887880
11230444427
12117486634
137a10406c
1448b219c4
152cc7458a
hex1d149408

487887880 has 32 divisors (see below), whose sum is σ = 1135603800. Its totient is φ = 188425216.

The previous prime is 487887877. The next prime is 487887887. The reversal of 487887880 is 88788784.

It can be written as a sum of positive squares in 4 ways, for example, as 349166596 + 138721284 = 18686^2 + 11778^2 .

It is a Harshad number since it is a multiple of its sum of digits (58).

It is not an unprimeable number, because it can be changed into a prime (487887887) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 209137 + ... + 211456.

Almost surely, 2487887880 is an apocalyptic number.

487887880 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

487887880 is an abundant number, since it is smaller than the sum of its proper divisors (647715920).

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

487887880 is a wasteful number, since it uses less digits than its factorization.

487887880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420633 (or 420629 counting only the distinct ones).

The product of its (nonzero) digits is 6422528, while the sum is 58.

The square root of 487887880 is about 22088.1841716335. The cubic root of 487887880 is about 787.2391369114.

The spelling of 487887880 in words is "four hundred eighty-seven million, eight hundred eighty-seven thousand, eight hundred eighty".

Divisors: 1 2 4 5 8 10 20 29 40 58 116 145 232 290 580 1160 420593 841186 1682372 2102965 3364744 4205930 8411860 12197197 16823720 24394394 48788788 60985985 97577576 121971970 243943940 487887880