40423512 has 64 divisors (see below), whose sum is σ = 107124480. Its totient is φ = 12684672.

The previous prime is 40423459. The next prime is 40423517. The reversal of 40423512 is 21532404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40423517) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36438 + ... + 37530.

It is an arithmetic number, because the mean of its divisors is an integer number (1673820).

Almost surely, 2^40423512 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40423512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53562240).

40423512 is an abundant number, since it is smaller than the sum of its proper divisors (66700968).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40423512 is a wasteful number, since it uses less digits than its factorization.

40423512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1192 (or 1188 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 40423512 is about 6357.9487258077. The cubic root of 40423512 is about 343.1979466409.

Adding to 40423512 its reverse (21532404), we get a palindrome (61955916).

The spelling of 40423512 in words is "forty million, four hundred twenty-three thousand, five hundred twelve".