40643010 has 48 divisors (see below), whose sum is σ = 106007616. Its totient is φ = 10803744.

The previous prime is 40643003. The next prime is 40643011. The reversal of 40643010 is 1034604.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40643011) 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 23 ways as a sum of consecutive naturals, for example, 41547 + ... + 42513.

It is an arithmetic number, because the mean of its divisors is an integer number (2208492).

Almost surely, 2^40643010 is an apocalyptic number.

40643010 is an abundant number, since it is smaller than the sum of its proper divisors (65364606).

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

40643010 is a wasteful number, since it uses less digits than its factorization.

40643010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1447 (or 1444 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 40643010 is about 6375.1870560792. The cubic root of 40643010 is about 343.8180092435.

Adding to 40643010 its reverse (1034604), we get a palindrome (41677614).

The spelling of 40643010 in words is "forty million, six hundred forty-three thousand, ten".