40024451 has 4 divisors (see below), whose sum is σ = 40064304. Its totient is φ = 39984600.

The previous prime is 40024447. The next prime is 40024463. The reversal of 40024451 is 15442004.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40024451 - 2² = 40024447 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40024421) 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, 18380 + ... + 20441.

It is an arithmetic number, because the mean of its divisors is an integer number (10016076).

Almost surely, 2^40024451 is an apocalyptic number.

40024451 is a deficient number, since it is larger than the sum of its proper divisors (39853).

40024451 is a wasteful number, since it uses less digits than its factorization.

40024451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39852.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 40024451 is about 6326.4880463018. The cubic root of 40024451 is about 342.0648595112.

Adding to 40024451 its reverse (15442004), we get a palindrome (55466455).

The spelling of 40024451 in words is "forty million, twenty-four thousand, four hundred fifty-one".