40442453 has 4 divisors (see below), whose sum is σ = 40524000. Its totient is φ = 40360908.

The previous prime is 40442447. The next prime is 40442471. The reversal of 40442453 is 35424404.

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 40442453 - 2¹² = 40438357 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 (40442483) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40025 + ... + 41022.

It is an arithmetic number, because the mean of its divisors is an integer number (10131000).

Almost surely, 2^40442453 is an apocalyptic number.

It is an amenable number.

40442453 is a deficient number, since it is larger than the sum of its proper divisors (81547).

40442453 is an equidigital number, since it uses as much as digits as its factorization.

40442453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81546.

The product of its (nonzero) digits is 7680, while the sum is 26.

The square root of 40442453 is about 6359.4381041095. The cubic root of 40442453 is about 343.2515416648.

Adding to 40442453 its reverse (35424404), we get a palindrome (75866857).

The spelling of 40442453 in words is "forty million, four hundred forty-two thousand, four hundred fifty-three".