40024661 has 4 divisors (see below), whose sum is σ = 40622112. Its totient is φ = 39427212.

The previous prime is 40024657. The next prime is 40024693. The reversal of 40024661 is 16642004.

It is a happy number.

40024661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40024661 - 2² = 40024657 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40024631) 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 3 ways as a sum of consecutive naturals, for example, 298625 + ... + 298758.

It is an arithmetic number, because the mean of its divisors is an integer number (10155528).

Almost surely, 2^40024661 is an apocalyptic number.

It is an amenable number.

40024661 is a deficient number, since it is larger than the sum of its proper divisors (597451).

40024661 is an equidigital number, since it uses as much as digits as its factorization.

40024661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 597450.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 40024661 is about 6326.5046431659. The cubic root of 40024661 is about 342.0654577579.

Adding to 40024661 its reverse (16642004), we get a palindrome (56666665).

The spelling of 40024661 in words is "forty million, twenty-four thousand, six hundred sixty-one".