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40505747 = 1731101761
BaseRepresentation
bin1001101010000…
…1000110010011
32211012220102212
42122201012103
540332140442
64004102335
71001202362
oct232410623
984186385
1040505747
1120956627
12116949ab
138512ac9
1455457d9
153851a82
hex26a1193

40505747 has 16 divisors (see below), whose sum is σ = 44769024. Its totient is φ = 36480000.

The previous prime is 40505741. The next prime is 40505789. The reversal of 40505747 is 74750504.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-40505747 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40505741) 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 15 ways as a sum of consecutive naturals, for example, 52847 + ... + 53607.

It is an arithmetic number, because the mean of its divisors is an integer number (2798064).

Almost surely, 240505747 is an apocalyptic number.

40505747 is a deficient number, since it is larger than the sum of its proper divisors (4263277).

40505747 is a wasteful number, since it uses less digits than its factorization.

40505747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 910.

The product of its (nonzero) digits is 19600, while the sum is 32.

The square root of 40505747 is about 6364.4125416255. The cubic root of 40505747 is about 343.4305156342.

The spelling of 40505747 in words is "forty million, five hundred five thousand, seven hundred forty-seven".

Divisors: 1 17 31 101 527 761 1717 3131 12937 23591 53227 76861 401047 1306637 2382691 40505747