40140212 has 18 divisors (see below), whose sum is σ = 81714402. Its totient is φ = 17202864.

The previous prime is 40140203. The next prime is 40140229. The reversal of 40140212 is 21204104.

It can be written as a sum of positive squares in only one way, i.e., 34739236 + 5400976 = 5894^2 + 2324^2 .

It is a super-2 number, since 2×40140212² = 3222473238809888, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 102203 + ... + 102594.

It is an arithmetic number, because the mean of its divisors is an integer number (4539689).

Almost surely, 2^40140212 is an apocalyptic number.

It is an amenable number.

40140212 is an abundant number, since it is smaller than the sum of its proper divisors (41574190).

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

40140212 is a wasteful number, since it uses less digits than its factorization.

40140212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204815 (or 204806 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 40140212 is about 6335.6303553790. The cubic root of 40140212 is about 342.3943219172.

Adding to 40140212 its reverse (21204104), we get a palindrome (61344316).

The spelling of 40140212 in words is "forty million, one hundred forty thousand, two hundred twelve".