40432340 has 24 divisors (see below), whose sum is σ = 91439880. Its totient is φ = 14928768.

The previous prime is 40432333. The next prime is 40432373. The reversal of 40432340 is 4323404.

It is a happy number.

40432340 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1669264 + 38763076 = 1292^2 + 6226^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

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 7 ways as a sum of consecutive naturals, for example, 77495 + ... + 78014.

It is an arithmetic number, because the mean of its divisors is an integer number (3809995).

Almost surely, 2^40432340 is an apocalyptic number.

It is an amenable number.

40432340 is an abundant number, since it is smaller than the sum of its proper divisors (51007540).

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

40432340 is a wasteful number, since it uses less digits than its factorization.

40432340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155531 (or 155529 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 20.

The square root of 40432340 is about 6358.6429369796. The cubic root of 40432340 is about 343.2229282320. Note that the first 3 decimals are identical.

Adding to 40432340 its reverse (4323404), we get a palindrome (44755744).

The spelling of 40432340 in words is "forty million, four hundred thirty-two thousand, three hundred forty".