40722649 has 4 divisors (see below), whose sum is σ = 44424720. Its totient is φ = 37020580.

The previous prime is 40722631. The next prime is 40722653. The reversal of 40722649 is 94622704.

40722649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40722649 - 2¹¹ = 40720601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40722049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1851019 + ... + 1851040.

It is an arithmetic number, because the mean of its divisors is an integer number (11106180).

Almost surely, 2^40722649 is an apocalyptic number.

It is an amenable number.

40722649 is a deficient number, since it is larger than the sum of its proper divisors (3702071).

40722649 is a wasteful number, since it uses less digits than its factorization.

40722649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3702070.

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 40722649 is about 6381.4300121524. The cubic root of 40722649 is about 344.0424304297.

The spelling of 40722649 in words is "forty million, seven hundred twenty-two thousand, six hundred forty-nine".