40629281 has 24 divisors (see below), whose sum is σ = 52788384. Its totient is φ = 30905280.

The previous prime is 40629209. The next prime is 40629287. The reversal of 40629281 is 18292604.

40629281 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 40629281 - 2²² = 36434977 is a prime.

It is a super-2 number, since 2×40629281² = 3301476949153922, which contains 22 as substring.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (40629287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22301 + ... + 24053.

It is an arithmetic number, because the mean of its divisors is an integer number (2199516).

Almost surely, 2^40629281 is an apocalyptic number.

It is an amenable number.

40629281 is a deficient number, since it is larger than the sum of its proper divisors (12159103).

40629281 is a wasteful number, since it uses less digits than its factorization.

40629281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1821 (or 1814 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 40629281 is about 6374.1102124140. The cubic root of 40629281 is about 343.7792915645.

The spelling of 40629281 in words is "forty million, six hundred twenty-nine thousand, two hundred eighty-one".