40371808 has 48 divisors (see below), whose sum is σ = 87333120. Its totient is φ = 18285696.

The previous prime is 40371803. The next prime is 40371823. The reversal of 40371808 is 80817304.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 40371808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40371803) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12541 + ... + 15427.

It is an arithmetic number, because the mean of its divisors is an integer number (1819440).

Almost surely, 2^40371808 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 40371808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43666560).

40371808 is an abundant number, since it is smaller than the sum of its proper divisors (46961312).

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

40371808 is a wasteful number, since it uses less digits than its factorization.

40371808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2939 (or 2931 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 40371808 is about 6353.8813334843. The cubic root of 40371808 is about 343.0515608979.

The spelling of 40371808 in words is "forty million, three hundred seventy-one thousand, eight hundred eight".