40778523 has 12 divisors (see below), whose sum is σ = 59013240. Its totient is φ = 27134496.

The previous prime is 40778513. The next prime is 40778531. The reversal of 40778523 is 32587704.

It is not a de Polignac number, because 40778523 - 2⁶ = 40778459 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40778513) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1140 + ... + 9102.

It is an arithmetic number, because the mean of its divisors is an integer number (4917770).

Almost surely, 2^40778523 is an apocalyptic number.

40778523 is a deficient number, since it is larger than the sum of its proper divisors (18234717).

40778523 is a wasteful number, since it uses less digits than its factorization.

40778523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8538 (or 8535 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 36.

The square root of 40778523 is about 6385.8063703811. The cubic root of 40778523 is about 344.1997077041.

The spelling of 40778523 in words is "forty million, seven hundred seventy-eight thousand, five hundred twenty-three".