40569616 has 20 divisors (see below), whose sum is σ = 83227932. Its totient is φ = 19091456.

The previous prime is 40569611. The next prime is 40569629. The reversal of 40569616 is 61696504.

It can be written as a sum of positive squares in 2 ways, for example, as 15968016 + 24601600 = 3996^2 + 4960^2 .

It is not an unprimeable number, because it can be changed into a prime (40569611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74305 + ... + 74848.

Almost surely, 2^40569616 is an apocalyptic number.

It is an amenable number.

40569616 is an abundant number, since it is smaller than the sum of its proper divisors (42658316).

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

40569616 is a wasteful number, since it uses less digits than its factorization.

40569616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149178 (or 149172 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 40569616 is about 6369.4282317960. The cubic root of 40569616 is about 343.6109266177.

The spelling of 40569616 in words is "forty million, five hundred sixty-nine thousand, six hundred sixteen".