40906040 has 32 divisors (see below), whose sum is σ = 105187680. Its totient is φ = 14024832.

The previous prime is 40906039. The next prime is 40906043. The reversal of 40906040 is 4060904.

It is a junction number, because it is equal to n+sod(n) for n = 40905997 and 40906015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40906043) 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 7 ways as a sum of consecutive naturals, for example, 72767 + ... + 73326.

It is an arithmetic number, because the mean of its divisors is an integer number (3287115).

Almost surely, 2^40906040 is an apocalyptic number.

40906040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40906040 is an abundant number, since it is smaller than the sum of its proper divisors (64281640).

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

40906040 is a wasteful number, since it uses less digits than its factorization.

40906040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146111 (or 146107 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 40906040 is about 6395.7829856867. The cubic root of 40906040 is about 344.5581124060.

Adding to 40906040 its reverse (4060904), we get a palindrome (44966944).

The spelling of 40906040 in words is "forty million, nine hundred six thousand, forty".