40785620 has 48 divisors (see below), whose sum is σ = 88315920. Its totient is φ = 15814656.

The previous prime is 40785607. The next prime is 40785623. The reversal of 40785620 is 2658704.

It can be written as a sum of positive squares in 8 ways, for example, as 386884 + 40398736 = 622^2 + 6356^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40785623) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 115364 + ... + 115716.

It is an arithmetic number, because the mean of its divisors is an integer number (1839915).

Almost surely, 2^40785620 is an apocalyptic number.

It is an amenable number.

40785620 is an abundant number, since it is smaller than the sum of its proper divisors (47530300).

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

40785620 is a wasteful number, since it uses less digits than its factorization.

40785620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 524 (or 522 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 40785620 is about 6386.3620317047. The cubic root of 40785620 is about 344.2196744533.

The spelling of 40785620 in words is "forty million, seven hundred eighty-five thousand, six hundred twenty".