40279808 has 36 divisors (see below), whose sum is σ = 83910288. Its totient is φ = 19261440.

The previous prime is 40279747. The next prime is 40279823. The reversal of 40279808 is 80897204.

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 3 ways as a sum of consecutive naturals, for example, 2468 + ... + 9308.

Almost surely, 2^40279808 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 40279808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41955144).

40279808 is an abundant number, since it is smaller than the sum of its proper divisors (43630480).

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

40279808 is an equidigital number, since it uses as much as digits as its factorization.

40279808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6880 (or 6866 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 40279808 is about 6346.6375349471. The cubic root of 40279808 is about 342.7907786896.

The spelling of 40279808 in words is "forty million, two hundred seventy-nine thousand, eight hundred eight".