40123212 has 24 divisors (see below), whose sum is σ = 98548800. Its totient is φ = 12670416.

The previous prime is 40123199. The next prime is 40123217. The reversal of 40123212 is 21232104.

It is a junction number, because it is equal to n+sod(n) for n = 40123191 and 40123200.

It is not an unprimeable number, because it can be changed into a prime (40123217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87762 + ... + 88217.

It is an arithmetic number, because the mean of its divisors is an integer number (4106200).

Almost surely, 2^40123212 is an apocalyptic number.

It is an amenable number.

40123212 is an abundant number, since it is smaller than the sum of its proper divisors (58425588).

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

40123212 is a wasteful number, since it uses less digits than its factorization.

40123212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176005 (or 176003 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 40123212 is about 6334.2885946253. The cubic root of 40123212 is about 342.3459786633.

Adding to 40123212 its reverse (21232104), we get a palindrome (61355316).

The spelling of 40123212 in words is "forty million, one hundred twenty-three thousand, two hundred twelve".