40388796 has 72 divisors (see below), whose sum is σ = 118145664. Its totient is φ = 11394720.

The previous prime is 40388791. The next prime is 40388807. The reversal of 40388796 is 69788304.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40388791) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 19951 + ... + 21881.

It is an arithmetic number, because the mean of its divisors is an integer number (1640912).

Almost surely, 2^40388796 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 40388796, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59072832).

40388796 is an abundant number, since it is smaller than the sum of its proper divisors (77756868).

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

40388796 is a wasteful number, since it uses less digits than its factorization.

40388796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2031 (or 2026 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 40388796 is about 6355.2180135696. The cubic root of 40388796 is about 343.0996715555.

The spelling of 40388796 in words is "forty million, three hundred eighty-eight thousand, seven hundred ninety-six".