40640622 has 16 divisors (see below), whose sum is σ = 88670592. Its totient is φ = 12315320.

The previous prime is 40640617. The next prime is 40640623. The reversal of 40640622 is 22604604.

It is a junction number, because it is equal to n+sod(n) for n = 40640592 and 40640601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40640623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 307818 + ... + 307949.

It is an arithmetic number, because the mean of its divisors is an integer number (5541912).

Almost surely, 2^40640622 is an apocalyptic number.

40640622 is an abundant number, since it is smaller than the sum of its proper divisors (48029970).

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

40640622 is a wasteful number, since it uses less digits than its factorization.

40640622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615783.

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 40640622 is about 6374.9997647059. Note that the first 3 decimals coincide. The cubic root of 40640622 is about 343.8112753797.

The spelling of 40640622 in words is "forty million, six hundred forty thousand, six hundred twenty-two".