40520645 has 16 divisors (see below), whose sum is σ = 53222400. Its totient is φ = 29371200.

The previous prime is 40520633. The next prime is 40520677. The reversal of 40520645 is 54602504.

40520645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 40520645 - 2⁶ = 40520581 is a prime.

It is a super-3 number, since 3×40520645³ (a number of 24 digits) contains 333 as substring.

It is a Curzon number.

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, 18140 + ... + 20250.

It is an arithmetic number, because the mean of its divisors is an integer number (3326400).

Almost surely, 2^40520645 is an apocalyptic number.

It is an amenable number.

40520645 is a deficient number, since it is larger than the sum of its proper divisors (12701755).

40520645 is a wasteful number, since it uses less digits than its factorization.

40520645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2476.

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

The square root of 40520645 is about 6365.5828484122. The cubic root of 40520645 is about 343.4726150156.

The spelling of 40520645 in words is "forty million, five hundred twenty thousand, six hundred forty-five".