40231664 has 80 divisors (see below), whose sum is σ = 91601280. Its totient is φ = 16922880.

The previous prime is 40231657. The next prime is 40231693. The reversal of 40231664 is 46613204.

40231664 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 177119 + ... + 177345.

It is an arithmetic number, because the mean of its divisors is an integer number (1145016).

Almost surely, 2^40231664 is an apocalyptic number.

40231664 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40231664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45800640).

40231664 is an abundant number, since it is smaller than the sum of its proper divisors (51369616).

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

40231664 is a wasteful number, since it uses less digits than its factorization.

40231664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318 (or 312 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 40231664 is about 6342.8435263689. The cubic root of 40231664 is about 342.6541519315.

Adding to 40231664 its reverse (46613204), we get a palindrome (86844868).

The spelling of 40231664 in words is "forty million, two hundred thirty-one thousand, six hundred sixty-four".