40778223 has 8 divisors (see below), whose sum is σ = 57569328. Its totient is φ = 25586304.

The previous prime is 40778219. The next prime is 40778267. The reversal of 40778223 is 32287704.

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

It is not a de Polignac number, because 40778223 - 2² = 40778219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40778293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 399736 + ... + 399837.

It is an arithmetic number, because the mean of its divisors is an integer number (7196166).

Almost surely, 2^40778223 is an apocalyptic number.

40778223 is a deficient number, since it is larger than the sum of its proper divisors (16791105).

40778223 is a wasteful number, since it uses less digits than its factorization.

40778223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 799593.

The product of its (nonzero) digits is 18816, while the sum is 33.

The square root of 40778223 is about 6385.7828807438. The cubic root of 40778223 is about 344.1988636309.

The spelling of 40778223 in words is "forty million, seven hundred seventy-eight thousand, two hundred twenty-three".