40820634 has 12 divisors (see below), whose sum is σ = 88444746. Its totient is φ = 13606872.

The previous prime is 40820623. The next prime is 40820639. The reversal of 40820634 is 43602804.

40820634 is a `hidden beast` number, since 4 + 0 + 8 + 20 + 634 = 666.

It can be written as a sum of positive squares in only one way, i.e., 26780625 + 14040009 = 5175^2 + 3747^2 .

It is a junction number, because it is equal to n+sod(n) for n = 40820598 and 40820607.

It is not an unprimeable number, because it can be changed into a prime (40820639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1133889 + ... + 1133924.

Almost surely, 2^40820634 is an apocalyptic number.

40820634 is an abundant number, since it is smaller than the sum of its proper divisors (47624112).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40820634 is a wasteful number, since it uses less digits than its factorization.

40820634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2267821 (or 2267818 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 40820634 is about 6389.1027539084. The cubic root of 40820634 is about 344.3181491963.

The spelling of 40820634 in words is "forty million, eight hundred twenty thousand, six hundred thirty-four".