40821064 has 16 divisors (see below), whose sum is σ = 78608700. Its totient is φ = 19858752.

The previous prime is 40821059. The next prime is 40821073. The reversal of 40821064 is 46012804.

It can be written as a sum of positive squares in 2 ways, for example, as 40424164 + 396900 = 6358^2 + 630^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68659 + ... + 69250.

Almost surely, 2^40821064 is an apocalyptic number.

It is an amenable number.

40821064 is a deficient number, since it is larger than the sum of its proper divisors (37787636).

40821064 is a wasteful number, since it uses less digits than its factorization.

40821064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137952 (or 137948 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 40821064 is about 6389.1364048672. The cubic root of 40821064 is about 344.3193581950.

Adding to 40821064 its reverse (46012804), we get a palindrome (86833868).

The spelling of 40821064 in words is "forty million, eight hundred twenty-one thousand, sixty-four".