40123412 has 12 divisors (see below), whose sum is σ = 80246880. Its totient is φ = 17195736.

The previous prime is 40123411. The next prime is 40123439. The reversal of 40123412 is 21432104.

40123412 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40123411) 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, 716462 + ... + 716517.

It is an arithmetic number, because the mean of its divisors is an integer number (6687240).

Almost surely, 2^40123412 is an apocalyptic number.

It is an amenable number.

40123412 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

40123412 is a wasteful number, since it uses less digits than its factorization.

40123412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1432990 (or 1432988 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 40123412 is about 6334.3043816981. The cubic root of 40123412 is about 342.3465474868.

Adding to 40123412 its reverse (21432104), we get a palindrome (61555516).

The spelling of 40123412 in words is "forty million, one hundred twenty-three thousand, four hundred twelve".