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3869959681 = 7288872
BaseRepresentation
bin1110011010101010…
…1110011000000001
3100222201000022200001
43212222232120001
530411202202211
61440002400001
7164621054200
oct34652563001
910881008601
103869959681
111706544a95
12900060001
134989c0793
14289d83237
15179b39ac1
hexe6aae601

3869959681 has 9 divisors (see below), whose sum is σ = 4502296449. Its totient is φ = 3316735044.

The previous prime is 3869959673. The next prime is 3869959693. The reversal of 3869959681 is 1869599683.

Multipling 3869959681 by its sum of digits (64), we get a square (247677419584 = 4976722).

It is a happy number.

The square root of 3869959681 is 62209.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 3869959681 - 23 = 3869959673 is a prime.

It is a super-2 number, since 2×38699596812 = 29953175865131243522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3869959661) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 431020 + ... + 439906.

It is an arithmetic number, because the mean of its divisors is an integer number (500255161).

Almost surely, 23869959681 is an apocalyptic number.

3869959681 is the 62209-th square number.

3869959681 is the 31105-th centered octagonal number.

It is an amenable number.

3869959681 is a deficient number, since it is larger than the sum of its proper divisors (632336768).

3869959681 is an frugal number, since it uses more digits than its factorization.

3869959681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17788 (or 8894 counting only the distinct ones).

The product of its digits is 25194240, while the sum is 64.

The cubic root of 3869959681 is about 1570.0090173526.

The spelling of 3869959681 in words is "three billion, eight hundred sixty-nine million, nine hundred fifty-nine thousand, six hundred eighty-one".

Divisors: 1 7 49 8887 62209 435463 78978769 552851383 3869959681