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40290666 = 23131633169
BaseRepresentation
bin1001100110110…
…0100101101010
32210210222101220
42121230211222
540303300131
63555322510
7666315333
oct231544552
983728356
1040290666
1120819a79
12115b0436
138468c40
1454cb28a
15380ce96
hex266c96a

40290666 has 32 divisors (see below), whose sum is σ = 87339840. Its totient is φ = 12317184.

The previous prime is 40290647. The next prime is 40290673. The reversal of 40290666 is 66609204.

40290666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11130 + ... + 14298.

It is an arithmetic number, because the mean of its divisors is an integer number (2729370).

Almost surely, 240290666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40290666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43669920).

40290666 is an abundant number, since it is smaller than the sum of its proper divisors (47049174).

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

40290666 is a wasteful number, since it uses less digits than its factorization.

40290666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3350.

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 40290666 is about 6347.4928908979. The cubic root of 40290666 is about 342.8215773128.

The spelling of 40290666 in words is "forty million, two hundred ninety thousand, six hundred sixty-six".

Divisors: 1 2 3 6 13 26 39 78 163 326 489 978 2119 3169 4238 6338 6357 9507 12714 19014 41197 82394 123591 247182 516547 1033094 1549641 3099282 6715111 13430222 20145333 40290666