40707821 has 8 divisors (see below), whose sum is σ = 50752704. Its totient is φ = 31720320.

The previous prime is 40707803. The next prime is 40707833. The reversal of 40707821 is 12870704.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40707821 - 2⁶ = 40707757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40707521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 264260 + ... + 264413.

It is an arithmetic number, because the mean of its divisors is an integer number (6344088).

Almost surely, 2^40707821 is an apocalyptic number.

It is an amenable number.

40707821 is a deficient number, since it is larger than the sum of its proper divisors (10044883).

40707821 is a wasteful number, since it uses less digits than its factorization.

40707821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 528691.

The product of its (nonzero) digits is 3136, while the sum is 29.

The square root of 40707821 is about 6380.2680978153. The cubic root of 40707821 is about 344.0006675893. Note that the first 3 decimals are identical.

The spelling of 40707821 in words is "forty million, seven hundred seven thousand, eight hundred twenty-one".