40405412 has 6 divisors (see below), whose sum is σ = 70709478. Its totient is φ = 20202704.

The previous prime is 40405399. The next prime is 40405429. The reversal of 40405412 is 21450404.

It can be written as a sum of positive squares in only one way, i.e., 39137536 + 1267876 = 6256^2 + 1126^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5050673 + ... + 5050680.

It is an arithmetic number, because the mean of its divisors is an integer number (11784913).

Almost surely, 2^40405412 is an apocalyptic number.

It is an amenable number.

40405412 is a deficient number, since it is larger than the sum of its proper divisors (30304066).

40405412 is a wasteful number, since it uses less digits than its factorization.

40405412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10101357 (or 10101355 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 40405412 is about 6356.5251513700. The cubic root of 40405412 is about 343.1467156460.

Adding to 40405412 its reverse (21450404), we get a palindrome (61855816).

The spelling of 40405412 in words is "forty million, four hundred five thousand, four hundred twelve".