40394808 has 128 divisors (see below), whose sum is σ = 120268800. Its totient is φ = 12532608.

The previous prime is 40394803. The next prime is 40394813. The reversal of 40394808 is 80849304.

It is an interprime number because it is at equal distance from previous prime (40394803) and next prime (40394813).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40394803) 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, 233410 + ... + 233582.

It is an arithmetic number, because the mean of its divisors is an integer number (939600).

Almost surely, 2^40394808 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 40394808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60134400).

40394808 is an abundant number, since it is smaller than the sum of its proper divisors (79873992).

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

40394808 is a wasteful number, since it uses less digits than its factorization.

40394808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258 (or 248 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 40394808 is about 6355.6909931179. The cubic root of 40394808 is about 343.1166945345.

The spelling of 40394808 in words is "forty million, three hundred ninety-four thousand, eight hundred eight".