40767640 has 32 divisors (see below), whose sum is σ = 92644560. Its totient is φ = 16144000.

The previous prime is 40767637. The next prime is 40767641. The reversal of 40767640 is 4676704.

It is a junction number, because it is equal to n+sod(n) for n = 40767596 and 40767605.

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 polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1006 + ... + 9085.

Almost surely, 2^40767640 is an apocalyptic number.

40767640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40767640 is an abundant number, since it is smaller than the sum of its proper divisors (51876920).

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

40767640 is a wasteful number, since it uses less digits than its factorization.

40767640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10203 (or 10199 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 34.

The square root of 40767640 is about 6384.9541893423. The cubic root of 40767640 is about 344.1690848955.

The spelling of 40767640 in words is "forty million, seven hundred sixty-seven thousand, six hundred forty".