40090908 has 96 divisors (see below), whose sum is σ = 111992832. Its totient is φ = 11001600.

The previous prime is 40090903. The next prime is 40090933. The reversal of 40090908 is 80909004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40090901) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 104485 + ... + 104867.

It is an arithmetic number, because the mean of its divisors is an integer number (1166592).

Almost surely, 2^40090908 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 40090908, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55996416).

40090908 is an abundant number, since it is smaller than the sum of its proper divisors (71901924).

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

40090908 is a wasteful number, since it uses less digits than its factorization.

40090908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475 (or 473 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 40090908 is about 6331.7381499869. The cubic root of 40090908 is about 342.2540774649.

The spelling of 40090908 in words is "forty million, ninety thousand, nine hundred eight".