40287904 has 96 divisors (see below), whose sum is σ = 90478080. Its totient is φ = 17563392.

The previous prime is 40287889. The next prime is 40287979. The reversal of 40287904 is 40978204.

It is a happy number.

40287904 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 40287904.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 601279 + ... + 601345.

It is an arithmetic number, because the mean of its divisors is an integer number (942480).

Almost surely, 2^40287904 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 40287904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45239040).

40287904 is an abundant number, since it is smaller than the sum of its proper divisors (50190176).

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

40287904 is a wasteful number, since it uses less digits than its factorization.

40287904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162 (or 154 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 40287904 is about 6347.2753209547. The cubic root of 40287904 is about 342.8137434485.

The spelling of 40287904 in words is "forty million, two hundred eighty-seven thousand, nine hundred four".