40781766 has 32 divisors (see below), whose sum is σ = 83099520. Its totient is φ = 13340736.

The previous prime is 40781707. The next prime is 40781777. The reversal of 40781766 is 66718704.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89010 + ... + 89466.

It is an arithmetic number, because the mean of its divisors is an integer number (2596860).

Almost surely, 2^40781766 is an apocalyptic number.

40781766 is an abundant number, since it is smaller than the sum of its proper divisors (42317754).

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

40781766 is a wasteful number, since it uses less digits than its factorization.

40781766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 708.

The product of its (nonzero) digits is 56448, while the sum is 39.

The square root of 40781766 is about 6386.0602878457. The cubic root of 40781766 is about 344.2088318703.

The spelling of 40781766 in words is "forty million, seven hundred eighty-one thousand, seven hundred sixty-six".