Search a number
-
+
30760681 = 721075867
BaseRepresentation
bin111010101010…
…1111011101001
32010212210201111
41311111323221
530333320211
63015150321
7522314200
oct165257351
963783644
1030760681
11163aaa56
12a3753a1
1364b02b3
14412a237
152a79421
hex1d55ee9

30760681 has 12 divisors (see below), whose sum is σ = 36123408. Its totient is φ = 26115432.

The previous prime is 30760673. The next prime is 30760687. The reversal of 30760681 is 18606703.

It is not a de Polignac number, because 30760681 - 23 = 30760673 is a prime.

It is a super-2 number, since 2×307606812 = 1892438991167522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30760687) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2310 + ... + 8176.

It is an arithmetic number, because the mean of its divisors is an integer number (3010284).

Almost surely, 230760681 is an apocalyptic number.

It is an amenable number.

30760681 is a deficient number, since it is larger than the sum of its proper divisors (5362727).

30760681 is a wasteful number, since it uses less digits than its factorization.

30760681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5988 (or 5981 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 30760681 is about 5546.2312429252. The cubic root of 30760681 is about 313.3275974756.

The spelling of 30760681 in words is "thirty million, seven hundred sixty thousand, six hundred eighty-one".

Divisors: 1 7 49 107 749 5243 5867 41069 287483 627769 4394383 30760681