40145534 has 64 divisors (see below), whose sum is σ = 78382080. Its totient is φ = 15121920.

The previous prime is 40145533. The next prime is 40145549. The reversal of 40145534 is 43554104.

40145534 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×40145534² = 3223327800290312, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40145533) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 111647 + ... + 112005.

It is an arithmetic number, because the mean of its divisors is an integer number (1224720).

Almost surely, 2^40145534 is an apocalyptic number.

40145534 is a deficient number, since it is larger than the sum of its proper divisors (38236546).

40145534 is a wasteful number, since it uses less digits than its factorization.

40145534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425.

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 40145534 is about 6336.0503470222. The cubic root of 40145534 is about 342.4094533940.

Adding to 40145534 its reverse (43554104), we get a palindrome (83699638).

The spelling of 40145534 in words is "forty million, one hundred forty-five thousand, five hundred thirty-four".