40523990 has 32 divisors (see below), whose sum is σ = 80480736. Its totient is φ = 14595840.

The previous prime is 40523939. The next prime is 40524023. The reversal of 40523990 is 9932504.

40523990 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax 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, 1529 + ... + 9131.

It is an arithmetic number, because the mean of its divisors is an integer number (2515023).

Almost surely, 2^40523990 is an apocalyptic number.

40523990 is a deficient number, since it is larger than the sum of its proper divisors (39956746).

40523990 is a wasteful number, since it uses less digits than its factorization.

40523990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7664.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 40523990 is about 6365.8455840524. The cubic root of 40523990 is about 343.4820660356.

The spelling of 40523990 in words is "forty million, five hundred twenty-three thousand, nine hundred ninety".