40565000 has 160 divisors (see below), whose sum is σ = 116212800. Its totient is φ = 12960000.

The previous prime is 40564991. The next prime is 40565003. The reversal of 40565000 is 56504.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40565003) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 664970 + ... + 665030.

It is an arithmetic number, because the mean of its divisors is an integer number (726330).

Almost surely, 2^40565000 is an apocalyptic number.

40565000 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40565000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58106400).

40565000 is an abundant number, since it is smaller than the sum of its proper divisors (75647800).

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

40565000 is a wasteful number, since it uses less digits than its factorization.

40565000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113 (or 94 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 40565000 is about 6369.0658655724. The cubic root of 40565000 is about 343.5978941371.

The spelling of 40565000 in words is "forty million, five hundred sixty-five thousand".