40120212 has 36 divisors (see below), whose sum is σ = 102901568. Its totient is φ = 12157200.

The previous prime is 40120139. The next prime is 40120217. The reversal of 40120212 is 21202104.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40120217) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12364 + ... + 15267.

Almost surely, 2^40120212 is an apocalyptic number.

It is an amenable number.

40120212 is an abundant number, since it is smaller than the sum of its proper divisors (62781356).

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

40120212 is a wasteful number, since it uses less digits than its factorization.

40120212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27660 (or 27647 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 40120212 is about 6334.0517838111. The cubic root of 40120212 is about 342.3374460834.

Adding to 40120212 its reverse (21202104), we get a palindrome (61322316).

The spelling of 40120212 in words is "forty million, one hundred twenty thousand, two hundred twelve".