40423142 has 8 divisors (see below), whose sum is σ = 61662600. Its totient is φ = 19868944.

The previous prime is 40423133. The next prime is 40423147. The reversal of 40423142 is 24132404.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40423147) 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, 171167 + ... + 171402.

It is an arithmetic number, because the mean of its divisors is an integer number (7707825).

Almost surely, 2^40423142 is an apocalyptic number.

40423142 is a deficient number, since it is larger than the sum of its proper divisors (21239458).

40423142 is a wasteful number, since it uses less digits than its factorization.

40423142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342630.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 40423142 is about 6357.9196283061. The cubic root of 40423142 is about 343.1968995306.

Adding to 40423142 its reverse (24132404), we get a palindrome (64555546).

The spelling of 40423142 in words is "forty million, four hundred twenty-three thousand, one hundred forty-two".