40767644 has 6 divisors (see below), whose sum is σ = 71343384. Its totient is φ = 20383820.

The previous prime is 40767641. The next prime is 40767677. The reversal of 40767644 is 44676704.

It is a junction number, because it is equal to n+sod(n) for n = 40767598 and 40767607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40767641) 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 as a sum of consecutive naturals, namely, 5095952 + ... + 5095959.

It is an arithmetic number, because the mean of its divisors is an integer number (11890564).

Almost surely, 2^40767644 is an apocalyptic number.

It is an amenable number.

40767644 is a deficient number, since it is larger than the sum of its proper divisors (30575740).

40767644 is a wasteful number, since it uses less digits than its factorization.

40767644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10191915 (or 10191913 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 38.

The square root of 40767644 is about 6384.9545025787. The cubic root of 40767644 is about 344.1690961518.

The spelling of 40767644 in words is "forty million, seven hundred sixty-seven thousand, six hundred forty-four".