40020212 has 6 divisors (see below), whose sum is σ = 70035378. Its totient is φ = 20010104.

The previous prime is 40020191. The next prime is 40020221. The reversal of 40020212 is 21202004.

It can be written as a sum of positive squares in only one way, i.e., 40018276 + 1936 = 6326^2 + 44^2 .

It is a junction number, because it is equal to n+sod(n) for n = 40020193 and 40020202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5002523 + ... + 5002530.

It is an arithmetic number, because the mean of its divisors is an integer number (11672563).

Almost surely, 2^40020212 is an apocalyptic number.

It is an amenable number.

40020212 is a deficient number, since it is larger than the sum of its proper divisors (30015166).

40020212 is a wasteful number, since it uses less digits than its factorization.

40020212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10005057 (or 10005055 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 40020212 is about 6326.1530174348. The cubic root of 40020212 is about 342.0527830255.

Adding to 40020212 its reverse (21202004), we get a palindrome (61222216).

The spelling of 40020212 in words is "forty million, twenty thousand, two hundred twelve".