40909140 has 144 divisors (see below), whose sum is σ = 136216080. Its totient is φ = 9891840.

The previous prime is 40909139. The next prime is 40909151. The reversal of 40909140 is 4190904.

It can be written as a sum of positive squares in 8 ways, for example, as 324 + 40908816 = 18^2 + 6396^2 .

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 88510 + ... + 88970.

It is an arithmetic number, because the mean of its divisors is an integer number (945945).

Almost surely, 2^40909140 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40909140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68108040).

40909140 is an abundant number, since it is smaller than the sum of its proper divisors (95306940).

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

40909140 is a wasteful number, since it uses less digits than its factorization.

40909140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 522 (or 517 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 40909140 is about 6396.0253282801. The cubic root of 40909140 is about 344.5668161180.

The spelling of 40909140 in words is "forty million, nine hundred nine thousand, one hundred forty".