40523665 has 64 divisors (see below), whose sum is σ = 65802240. Its totient is φ = 23362560.

The previous prime is 40523663. The next prime is 40523683. The reversal of 40523665 is 56632504.

40523665 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 40523665 - 2¹ = 40523663 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is not an unprimeable number, because it can be changed into a prime (40523663) 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 63 ways as a sum of consecutive naturals, for example, 1307200 + ... + 1307230.

It is an arithmetic number, because the mean of its divisors is an integer number (1028160).

Almost surely, 2^40523665 is an apocalyptic number.

It is an amenable number.

40523665 is a deficient number, since it is larger than the sum of its proper divisors (25278575).

40523665 is a wasteful number, since it uses less digits than its factorization.

40523665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99 (or 73 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 31.

The square root of 40523665 is about 6365.8200571490. The cubic root of 40523665 is about 343.4811477979.

The spelling of 40523665 in words is "forty million, five hundred twenty-three thousand, six hundred sixty-five".