40620081 has 12 divisors (see below), whose sum is σ = 57162192. Its totient is φ = 25654104.

The previous prime is 40620077. The next prime is 40620121. The reversal of 40620081 is 18002604.

It is not a de Polignac number, because 40620081 - 2² = 40620077 is a prime.

It is a super-2 number, since 2×40620081² = 3299981960893122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40620071) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17671 + ... + 19836.

It is an arithmetic number, because the mean of its divisors is an integer number (4763516).

Almost surely, 2^40620081 is an apocalyptic number.

It is an amenable number.

40620081 is a deficient number, since it is larger than the sum of its proper divisors (16542111).

40620081 is a wasteful number, since it uses less digits than its factorization.

40620081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37548 (or 37529 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 40620081 is about 6373.3885022019. The cubic root of 40620081 is about 343.7533414110.

Adding to 40620081 its reverse (18002604), we get a palindrome (58622685).

The spelling of 40620081 in words is "forty million, six hundred twenty thousand, eighty-one".