40432145 has 16 divisors (see below), whose sum is σ = 52972752. Its totient is φ = 29445120.

The previous prime is 40432141. The next prime is 40432159. The reversal of 40432145 is 54123404.

40432145 = 316² + 317² + ... + 534².

It can be written as a sum of positive squares in 8 ways, for example, as 2289169 + 38142976 = 1513^2 + 6176^2 .

It is not a de Polignac number, because 40432145 - 2² = 40432141 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40432145.

It is not an unprimeable number, because it can be changed into a prime (40432141) 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 15 ways as a sum of consecutive naturals, for example, 485 + ... + 9005.

It is an arithmetic number, because the mean of its divisors is an integer number (3310797).

Almost surely, 2^40432145 is an apocalyptic number.

It is an amenable number.

40432145 is a deficient number, since it is larger than the sum of its proper divisors (12540607).

40432145 is a wasteful number, since it uses less digits than its factorization.

40432145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8612.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 40432145 is about 6358.6276035006. The cubic root of 40432145 is about 343.2223764577. Note that the first 3 decimals are identical.

Adding to 40432145 its reverse (54123404), we get a palindrome (94555549).

The spelling of 40432145 in words is "forty million, four hundred thirty-two thousand, one hundred forty-five".