40020052 has 6 divisors (see below), whose sum is σ = 70035098. Its totient is φ = 20010024.

The previous prime is 40020041. The next prime is 40020067. The reversal of 40020052 is 25002004.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 31516996 + 8503056 = 5614^2 + 2916^2 .

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, 5002503 + ... + 5002510.

Almost surely, 2^40020052 is an apocalyptic number.

It is an amenable number.

40020052 is a deficient number, since it is larger than the sum of its proper divisors (30015046).

40020052 is a wasteful number, since it uses less digits than its factorization.

40020052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10005017 (or 10005015 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 13.

The square root of 40020052 is about 6326.1403715062. The cubic root of 40020052 is about 342.0523271848.

Adding to 40020052 its reverse (25002004), we get a palindrome (65022056).

The spelling of 40020052 in words is "forty million, twenty thousand, fifty-two".