40065020 has 24 divisors (see below), whose sum is σ = 86851968. Its totient is φ = 15508800.

The previous prime is 40065017. The next prime is 40065029. The reversal of 40065020 is 2056004.

It is a self number, because there is not a number n which added to its sum of digits gives 40065020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40065029) 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, 31691 + ... + 32930.

It is an arithmetic number, because the mean of its divisors is an integer number (3618832).

Almost surely, 2^40065020 is an apocalyptic number.

It is an amenable number.

40065020 is an abundant number, since it is smaller than the sum of its proper divisors (46786948).

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

40065020 is a wasteful number, since it uses less digits than its factorization.

40065020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64661 (or 64659 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 40065020 is about 6329.6935154871. The cubic root of 40065020 is about 342.1803934152.

The spelling of 40065020 in words is "forty million, sixty-five thousand, twenty".