40851644 has 6 divisors (see below), whose sum is σ = 71490384. Its totient is φ = 20425820.

The previous prime is 40851641. The next prime is 40851649. The reversal of 40851644 is 44615804.

It is a self number, because there is not a number n which added to its sum of digits gives 40851644.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40851641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5106452 + ... + 5106459.

It is an arithmetic number, because the mean of its divisors is an integer number (11915064).

Almost surely, 2^40851644 is an apocalyptic number.

It is an amenable number.

40851644 is a deficient number, since it is larger than the sum of its proper divisors (30638740).

40851644 is a wasteful number, since it uses less digits than its factorization.

40851644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10212915 (or 10212913 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 32.

The square root of 40851644 is about 6391.5290815266. The cubic root of 40851644 is about 344.4053159237.

The spelling of 40851644 in words is "forty million, eight hundred fifty-one thousand, six hundred forty-four".